MESON Chess Problem Database

Problem Display
PID: 166160 (8/p7/2R1p3/2R1p3/4k2K/2r1P3/2P2Q2/1B6 w - - 0 1)

Kawagoe, Toshiji

StrateGems, 2016

8/p7/2R1p3/2R1p3/4k2K/2r1P3/2P2Q2/1B6

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Bxc2#
    • 1...Ra3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rc4
      • 2.c3#
    • 1...Rxc5
      • 2.c4#
  • Tries
    • 1.Kg3?
      • threat
        • 2.Qf3#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxe3+!
    • 1.Kg4?
      • threat
        • 2.Qf3#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxe3!
    • 1.Rc4+?
      • 1...Kd5
        • 2.e4#
      • 1...Rxc4!
    • 1.Ra5?
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxe3
        • 2.Rc4#
      • 1...Rxc6
        • 2.c3#
        • 2.c4#
      • 1...Rc5
        • 2.c4#
      • 1...Ra3
        • 2.Rc4#
        • 2.c3#
      • 1...Rb3
        • 2.Rc4#
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.Rxc4#
        • 2.c3#
      • 1...a6!
    • 1.Rxe6?
      • threat
        • 2.Rcxe5#
        • 2.Rexe5#
        • 2.Qf4#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxc5
        • 2.c4#
      • 1...Rxe3!
    • 1.Qg3?
      • threat
        • 2.Rxe5#
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxe3
        • 2.Qg4#
      • 1...Rxc5
        • 2.c4#
      • 1...Kf5!
  • Keys
    • 1.Ra6!
      • 1...Rxc2
        • 2.Bxc2#
      • 1...Rxe3
        • 2.Ra4#
      • 1...Rxc5
        • 2.c4#
      • 1...Ra3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
    • R(a);OGATE::B(A)+P(B)
    • R(a);OGATE::B(A)+P(B),XR(a)
    • R(a);OGATE::P(B),XR(a)
    • R(a);OGATE,XR(F)::B(A)+P(B)
  • Tries
    • Try
      • K(E);P_SPINP(D),S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • R(a);N_PINP(D),OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
      • Refutation
        • R(a);CHECK,XP(D)
    • Try
      • K(E);P-FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
      • Refutation
        • R(a);XP(D)
    • Try
      • R(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::P(D)
      • Refutation
        • R(a);XR(F)
    • Try
      • R(F);
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
        • R(a);N_GUARD,XP(D)::R(G)
        • R(a);OGATE::B(A)+P(B)
        • R(a);OGATE::P(B),XR(a)
      • Refutation
        • P(e);
    • Try
      • R(G);P_PINP(c),XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
        • R(a);OGATE,XR(F)::B(A)+P(B)
      • Refutation
        • R(a);XP(D)
    • Try
      • Q(C);
      • Threat
        • R1(F),XP(c)
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
        • R(a);SBLOCK,XP(D)::QAR2(C)
        • R(a);OGATE,XR(F)::B(A)+P(B)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
  • Actual
    • R(G);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(B)::B(A),XR(a)
      • R(a);N_GUARD,XP(D)::R(G)
      • R(a);OGATE,XR(F)::B(A)+P(B)
      • R(a);OGATE::B(A)+P(B)
      • R(a);OGATE::B(A)+P(B),XR(a)
      • R(a);OGATE::P(B),XR(a)
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