MESON Chess Problem Database

Problem Display
PID: 57838 (8/8/1p6/1p3P1N/1R1pkP1P/4P2P/2RP2N1/5K1B w - - 0 1)

Groeneveld, Cornelis

Chess Life, 1957

8/8/1p6/1p3P1N/1R1pkP1P/4P2P/2RP2N1/5K1B

#2

12 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Se1#
    • 1...Kf3
      • 2.Se1#
    • 1...Kd5
      • 2.Rxd4#
  • Tries
    • 1.Ke2?
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Kf2?
      • 1...Kd3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Sg3+?
      • 1...Kd3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kf3!
    • 1.Sg7?
      • threat
        • 2.Se1#
      • 1...Kd3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kf3!
    • 1.Rc1?
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Rc3?
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Rc5?
      • threat
        • 2.Se1#
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Se1#
      • 1...bxc5!
    • 1.Rc7?
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Rc8?
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Kxf5!
    • 1.Rxd4+?
      • 1...Kf3
        • 2.Se1#
      • 1...Kxf5!
    • 1.Rxb5?
      • threat
        • 2.Se1#
      • 1...Kd3
        • 2.Se1#
      • 1...Kf3
        • 2.Se1#
      • 1...dxe3!
  • Keys
    • 1.Rc6!
      • 1...Kd3
        • 2.Rxd4#
      • 1...Kf3
        • 2.Se1#
      • 1...Kd5
        • 2.Se1#
      • 1...Kxf5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::S(E)
    • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
    • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(E)
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • S(L);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(E)
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(L);
      • Threat
        • B(B)+S(E)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(E)
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
        • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • R(C);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • R(C);
      • Threat
        • B(B)+S(E)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
        • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • P(d);XR(C)
    • Try
      • R(C);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
        • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • R(C);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
        • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(K)
    • Try
      • R(H);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • K(b);S_FLIGHT,XP(K)
    • Try
      • R(H);N_PINP(a),XP(c)
      • Threat
        • B(B)+S(E)
      • Vars
        • K(b);S_FLIGHT::S(E)
        • K(b);S_FLIGHT::B(B)+S(E),DCHECK
      • Refutation
        • P(a);XP(F)
  • Actual
    • R(C);
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::R1(H),XP(a)
      • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E),DCHECK
      • K(b);N_SPINP(a),S_FLIGHT::B(B)+S(E)
      • K(b);N_SPINP(a),S_FLIGHT,XP(K)::S(L)
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