MESON Chess Problem Database

Problem Display
PID: 172314 (2r5/1RP1kP2/2Q3K1/8/8/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

2r5/1RP1kP2/2Q3K1/8/8/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qc5#
      • 2.Qd6#
    • 1...Ra8
      • 2.c8Q#
      • 2.c8R#
    • 1...Rb8
      • 2.cxb8Q#
      • 2.cxb8R#
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8R#
    • 1...Rf8
      • 2.c8Q#
      • 2.c8R#
    • 1...Rh8
      • 2.c8Q#
      • 2.c8R#
  • Tries
    • 1.Qd7+?
      • 1...Kf8
        • 2.Qd6#
      • 1...Kxd7!
    • 1.Qe6+?
      • 1...Kf8
        • 2.Qd6#
      • 1...Kxe6!
    • 1.Qf6+?
      • 1...Kf8
        • 2.Qd6#
      • 1...Kd7!
    • 1.f8Q+?
      • 1...Rxf8
        • 2.c8Q#
        • 2.c8R#
      • 1...Kxf8!
    • 1.f8B+?
      • 1...Rxf8
        • 2.c8Q#
        • 2.c8R#
      • 1...Kxf8!
    • 1.f8R?
      • threat
        • 2.Rf7#
      • 1...Rxc7
        • 2.Re8#
      • 1...Rxf8
        • 2.c8Q#
        • 2.c8R#
      • 1...Kxf8!
  • Keys
    • 1.Kg7!
      • 1...Rg8+
        • 2.fxg8S#
      • 1...Rxc7
        • 2.f8Q#
      • 1...Ra8
        • 2.c8Q#
        • 2.c8R#
      • 1...Rb8
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Rd8
        • 2.c8S#
      • 1...Re8
        • 2.c8Q#
        • 2.c8R#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Rf8
        • 2.c8Q#
        • 2.c8R#
      • 1...Rh8
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE::P=Q
    • R(b);OGATE::PXR(b)=Q
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • R(b);OGATE,XQ(E)::P=Q
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
    • Try
      • P(E);CHECK
      • Vars
        • R(b);OGATE,XB(E)::P=Q
      • Refutation
        • K(a);S_FLIGHT,XB(E)
    • Try
      • P(E);
      • Threat
        • R1(E)
      • Vars
        • R(b);N_GUARD,P_SPINR(b),XP(D)::R1(E)
        • R(b);OGATE,XR(E)::P=Q
      • Refutation
        • K(a);S_FLIGHT,XR(E)
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=S
      • R(b);N_GUARD,P_SPINR(b),XP(D)::P=Q
      • R(b);OGATE::P=Q
      • R(b);OGATE::PXR(b)=Q
      • R(b);OGATE,SBLOCK::P=S
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