MESON Chess Problem Database

Problem Display
PID: 225440 (6K1/8/1p2p3/1R6/3kP1P1/1r6/1PPN1P2/6Q1 w - - 0 1)

Didenko, Vladimir Vasilovich

Praca, 1996

6K1/8/1p2p3/1R6/3kP1P1/1r6/1PPN1P2/6Q1

#2

9 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.fxe3#
    • 1...Rg3
      • 2.fxg3#
    • 1...Rh3
      • 2.f3#
    • 1...Rb4
      • 2.f3#
      • 2.f4#
    • 1...Rxb5
      • 2.f4#
    • 1...e5
      • 2.Rd5#
  • Tries
    • 1.Sxb3+?
      • 1...Kc4
        • 2.Qf1#
      • 1...Kxe4!
    • 1.Qg3?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Rxb2
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qe3#
        • 2.c3#
      • 1...Rxb5
        • 2.Qc3#
      • 1...e5
        • 2.Rd5#
        • 2.Qxe5#
      • 1...Rxg3!
    • 1.cxb3?
      • 1...e5
        • 2.Rd5#
      • 1...Kd3!
  • Keys
    • 1.Qa1!
      • 1...Rxb2
        • 2.Qxb2#
      • 1...Rxb5
        • 2.b4#
      • 1...Ra3
        • 2.bxa3#
      • 1...Rc3
        • 2.bxc3#
      • 1...Rd3
        • 2.Qa4#
      • 1...Re3
        • 2.Qa4#
      • 1...Rf3
        • 2.Qa4#
      • 1...Rg3
        • 2.Qa4#
      • 1...Rh3
        • 2.Qa4#
      • 1...Rb4
        • 2.b3#
      • 1...e5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::P(E),XR(a)
    • R(a);OGATE,P_PINP(G)::QAB(A)+P(E),XR(a)
    • R(a);N_GUARD::QAB(A)+P(E)
    • R(a);N_GUARD,XR(H)::QAB(A)+P(E)
    • P(d);N_GUARD::R1(H)
  • Tries
    • Try
      • S(D);CHECK,XR(a)
      • Vars
        • K(b);P-FLIGHT::QAB(A)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,XR(H)::QAB1(A)
      • Refutation
        • R(a);P_PINP(G),XQ(A)
    • Try
      • P(C);XR(a)
      • Vars
        • P(d);N_GUARD::R1(H)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
      • R(a);OGATE,XR(H)::QAB(A)+P(B)
      • R(a);OGATE::QAB(A)+P(B),XR(a)
      • R(a);OGATE::P(B),XR(a)
      • R(a);N_GUARD::QAR(A)
      • R(a);N_GUARD,P_PINP(G)::QAR(A)
      • R(a);OGATE::QAB(A)+P(B)
      • P(d);N_GUARD::R1(H)
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