MESON Chess Problem Database

Problem Display
PID: 247510 (R7/pk2p3/b1R1P3/1NKpP3/8/8/8/7B w - d5 0 1)

Chapman, CF

British Chess Magazine, 1931

R7/pk2p3/b1R1P3/1NKpP3/8/8/8/7B

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Rb6#
      • 2.Rd6#
      • 2.Rc7#
      • 2.Rcc8#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Rb6#
        • 2.Rd6#
        • 2.Rc7#
        • 2.Rcc8#
      • 1...Kxa8
        • 2.Rc8#
      • 1...Bxb5!
    • 1.Rxa6?
      • threat
        • 2.R6xa7#
      • 1...Kxa6
        • 2.Rxa7#
      • 1...Kxa8!
    • 1.Rb6+?
      • 1...Kxa8
        • 2.Sc7#
      • 1...axb6+!
  • Keys
    • 1.exd5 ep!
      • threat
        • 2.Rb6#
        • 2.Rc7#
        • 2.Rcc8#
      • 1...exd6+
        • 2.Rxd6#
      • 1...Kxa8
        • 2.Rc8#
      • 1...Bxb5
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);XP(a)
      • Threat
        • DUALS(4)
      • Vars
        • K(d);S_FLIGHT,XR(G)::B(A)+R(E),DCHECK
      • Refutation
        • B(b);XS(B)
    • Try
      • R(E);P_PINP(a),XB(b)
      • Threat
        • R1(E),XP(c)
      • Vars
        • K(d);N_SPINP(a),P_SPINP(c),S_FLIGHT,XR(E)::R1(G),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XR(G)
    • Try
      • R(E);CHECK,P_PINP(a)
      • Vars
        • K(d);S_FLIGHT,XR(G)::S(B)
      • Refutation
        • P(c);CHECK,XR(E)
  • Actual
    • P(D);EP,XP(a)
    • Threat
      • DUALS(3)
    • Vars
      • P(e);CHECK,OGATE,XP(D)::B(A)+R(E),XP(e)
      • K(d);S_FLIGHT,XR(G)::B(A)+R(E),DCHECK
      • B(b);XS(B)::B(A)+R(E),DCHECK
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