MESON Chess Problem Database

Problem Display
PID: 196759 (5r2/q1pR4/PBP1p3/p3kp1N/r6R/8/4N2P/3Q3K w - - 0 1)

Novejarque Iranzo, Francisco

Comm., Spanish National Ty., 1919

5r2/q1pR4/PBP1p3/p3kp1N/r6R/8/4N2P/3Q3K

#2

10 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa6
      • 2.Bxc7#
    • 1...Qa8
      • 2.Bxc7#
    • 1...Ra1
      • 2.Qxa1#
    • 1...Ra2
      • 2.Qd4#
    • 1...Ra3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...cxb6
      • 2.Qd6#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sf3#
        • 2.Qe2#
        • 2.Qe1#
      • 1...Qxa6
        • 2.Sf3#
        • 2.Bxc7#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...f4
        • 2.Qe2#
        • 2.Qe1#
      • 1...Ra1
        • 2.Sf3#
      • 1...Ra2
        • 2.Sf3#
      • 1...Ra3!
    • 1.Sef4?
      • threat
        • 2.Sd3#
        • 2.Sg6#
      • 1...Ke4
        • 2.Qe2#
      • 1...Qxa6
        • 2.Sg6#
      • 1...Ra3
        • 2.Sg6#
        • 2.Qd4#
      • 1...Rd4
        • 2.Sg6#
        • 2.Qxd4#
      • 1...Rf6
        • 2.Sd3#
      • 1...Rg8
        • 2.Sd3#
      • 1...Rxf4!
    • 1.Qxa4?
      • threat
        • 2.Qb5#
        • 2.Qa1#
        • 2.Qd4#
        • 2.Qf4#
        • 2.Qxa5#
      • 1...Qxb6
        • 2.Qf4#
      • 1...Qxa6
        • 2.Bd4#
        • 2.Bxc7#
        • 2.Qa1#
        • 2.Qd4#
        • 2.Qf4#
      • 1...cxb6
        • 2.Qb5#
        • 2.Qa1#
        • 2.Qd4#
        • 2.Qf4#
      • 1...f4!
    • 1.Qa1+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rxa1+!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sd4#
      • 1...Qxa6
        • 2.Bxc7#
      • 1...Rxh4
        • 2.Sef4#
      • 1...Rf4
        • 2.Sexf4#
      • 1...Rg4
        • 2.Sef4#
      • 1...Ra1
        • 2.Sc1#
        • 2.Qxa1#
      • 1...Ra2
        • 2.Qc3#
      • 1...Ra3
        • 2.Sc3#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Re4
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD,XP(G)::B(H),XP(g)
    • Q(f);N_GUARD,P_PINP(I)::B(H),XP(g)
    • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • P(g);N_GUARD,XB(H)::QAB1(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);OGATE,XS(C)::QAB1(A),XR(a)
        • R(a);P_PINQ(A)::S(C)
        • R(a);::S(C)
      • Refutation
        • R(a);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • Q(f);XP(G)::S(C)
        • R(h);::S(C)
      • Refutation
        • R(a);XS(C)
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(5)
      • Vars
        • Q(f);XB(H)::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • R(a);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(C)
    • Vars
      • Q(f);N_GUARD,XP(G)::B(H),XP(g)
      • R(a);N_GUARD,P_PINP(D),XR(E)::QAR(A)+S(C)
      • R(a);N_GUARD::QAR(A)+S(C),XR(a)
      • R(a);N_GUARD::QAR(A)+S(C)
      • R(a);N_GUARD::QAB(A)
      • R(a);::QAR(A)+S(C),XR(a)
      • R(a);N_GUARD::QAR(A),XP(b)
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