MESON Chess Problem Database

Problem Display
PID: 186172 (3Q4/1p3N2/1P1P1P2/1K1n1p2/RP1k1P1R/1B1p1P2/3P4/3N4 w - - 0 1)

White, James R

Problem Observer, 2017

3Q4/1p3N2/1P1P1P2/1K1n1p2/RP1k1P1R/1B1p1P2/3P4/3N4

#2

14 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3+
      • 2.dxc3#
    • 1...Se3
      • 2.dxe3#
    • 1...Sxb4
      • 2.Rxb4#
    • 1...Sxf4
      • 2.Rxf4#
    • 1...Sxb6
      • 2.Qxb6#
    • 1...Sxf6
      • 2.Qxf6#
    • 1...Sc7+
      • 2.dxc7#
    • 1...Se7
      • 2.dxe7#
  • Tries
    • 1.Ka5?
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Sc3
        • 2.dxc3#
      • 1...Se3
        • 2.dxe3#
      • 1...Sc7
        • 2.dxc7#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Sg5?
      • threat
        • 2.Se6#
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4!
    • 1.Sh6?
      • threat
        • 2.Sxf5#
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Sh8?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Bc4?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra1?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra2?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra3?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra5?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra7?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Ra8?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxb4!
    • 1.Rh1?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rh2?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rh3?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rg4?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...fxg4!
    • 1.Rh5?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rh6?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rh7?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Rh8?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#
      • 1...Sxf4!
    • 1.Qc7?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sc3+
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Sxb6
        • 2.Qxb6#
        • 2.Qc3#
        • 2.Qc5#
      • 1...Se3
        • 2.Qc3#
        • 2.Qc5#
        • 2.dxe3#
      • 1...Sxc7+!
    • 1.Qc8?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sc3+
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Sxb6
        • 2.Qc3#
        • 2.Qc5#
      • 1...Se3
        • 2.Qc3#
        • 2.Qc5#
        • 2.dxe3#
      • 1...Sc7+!
    • 1.Qg8?
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sxb4
        • 2.Rxb4#
        • 2.Qg1#
      • 1...Sxf4
        • 2.Rxf4#
        • 2.Qg1#
      • 1...Sxb6
        • 2.Qg1#
      • 1...Sxf6
        • 2.Qg1#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.Qg1#
      • 1...Sc7+!
  • Keys
    • 1.Ba2!
      • 1...Sc3+
        • 2.dxc3#
      • 1...Sc7+
        • 2.dxc7#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...Se7
        • 2.dxe7#

There are these versions: 186176, 186178

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,OGATE::P(B),XS(c)
    • S(c);OGATE::P(B),XS(c)
    • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
    • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
    • S(c);OGATE,XP(J)::QAB(N),XS(c)
    • S(c);OGATE,XP(L)::QAB(N),XS(c)
    • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
    • S(c);OGATE::QAR(N)+P(K),XS(c)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Vars
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);P_SPINS(c),XP(F)
    • Try
      • S(M);
      • Threat
        • S(M)
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);P_SPINS(c),XP(G)
    • Try
      • S(M);
      • Threat
        • S(M),XP(d)
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);P_SPINS(c),XP(G)
    • Try
      • S(M);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);P_SPINS(c),XP(G)
    • Try
      • B(C);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(E);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(F)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • P(d);XR(H)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • R(H);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
        • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
        • S(c);OGATE,XP(J)::QAB(N),XS(c)
        • S(c);OGATE,XP(L)::QAB(N),XS(c)
        • S(c);OGATE::P(B),XS(c)
        • S(c);OGATE::QAR(N)+P(K),XS(c)
      • Refutation
        • S(c);XP(G)
    • Try
      • Q(N);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);CHECK,XQ(N)
    • Try
      • Q(N);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(N);
      • Vars
        • S(c);CHECK,OGATE::P(B),XS(c)
        • S(c);N_GUARD,XP(J)::QAB(N)
        • S(c);N_GUARD,XP(L)::QAB(N)
        • S(c);OGATE::P(B),XS(c)
        • S(c);N_GUARD::QAB(N)
      • Refutation
        • S(c);CHECK
  • Actual
    • B(C);
    • Vars
      • S(c);CHECK,OGATE::P(B),XS(c)
      • S(c);CHECK,OGATE::QAR(N)+P(K),XS(c)
      • S(c);OGATE,P_SPINS(c),XP(F)::R(E),XS(c)
      • S(c);OGATE,P_SPINS(c),XP(G)::R(H),XS(c)
      • S(c);OGATE,XP(J)::QAB(N),XS(c)
      • S(c);OGATE,XP(L)::QAB(N),XS(c)
      • S(c);OGATE::P(B),XS(c)
      • S(c);OGATE::QAR(N)+P(K),XS(c)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).