MESON Chess Problem Database

Problem Display
PID: 257946 (8/1P1Q2P1/2N5/1p2p3/1Rb1k1P1/7N/3P2P1/4K3 w - - 0 1)

Hersom, Donald H

British Chess Magazine, 1934

8/1P1Q2P1/2N5/1p2p3/1Rb1k1P1/7N/3P2P1/4K3

#2

10 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Rb3?
      • threat
        • 2.Re3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxb3!
    • 1.Rxb5?
      • threat
        • 2.Rxe5#
        • 2.Qf5#
      • 1...Bd5
        • 2.Qf5#
        • 2.Qxd5#
      • 1...Be6
        • 2.Rxe5#
      • 1...Bxb5!
  • Keys
    • 1.Sd4!
      • 1...Kd3
        • 2.Sf2#
      • 1...exd4
        • 2.Qf5#
      • 1...Bf1
        • 2.Se2#
      • 1...Ba2
        • 2.Sb3#
      • 1...Be2
        • 2.Sxe2#
      • 1...Bb3
        • 2.Sxb3#
      • 1...Bd3
        • 2.Qc6#
      • 1...Bd5
        • 2.Qf5#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bf7
        • 2.Se6#
      • 1...Bg8
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);N_PINB(a)
      • Threat
        • R1(E)
      • Vars
        • B(a);N_GUARD::QAB1(I),XB(a)
      • Refutation
        • B(a);XR(E)
    • Try
      • R(E);N_PINB(a),XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::R1(E),XP(d)
      • Refutation
        • B(a);XR(E)
  • Actual
    • S(G);N_PINB(a)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::S(D)
      • P(d);SBLOCK,XS(G)::QAB1(I)
      • B(a);::R(E)+S(G)
      • B(a);::R(E)+S(G),XB(a)
      • B(a);N_GUARD,SBLOCK::QAB(I)
      • B(a);SBLOCK::QAB1(I)
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