MESON Chess Problem Database

Problem Display
PID: 49612 (1n2RQ2/2p1B2b/2P5/3Pk3/KR6/1P1r1pP1/8/8 w - - 0 1)

Langstaff, William A

The Problemist, 1930

1n2RQ2/2p1B2b/2P5/3Pk3/KR6/1P1r1pP1/8/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Bh4#
      • 2.Bc5#
      • 2.Bg5#
      • 2.Bd6#
      • 2.Bd8#
      • 2.Qf6#
  • Tries
    • 1.Qg7+?
      • 1...Kf5
        • 2.Rf4#
        • 2.Rf8#
        • 2.Qf6#
        • 2.Qg5#
        • 2.g4#
      • 1...Kxd5!
    • 1.Qf7?
      • threat
        • 2.Bc5#
        • 2.Bf8#
        • 2.Qe6#
      • 1...Rxd5
        • 2.Bc5#
        • 2.Bf8#
        • 2.Qf6#
      • 1...Sxc6
        • 2.Qe6#
      • 1...Bg8
        • 2.Bc5#
        • 2.Bf8#
        • 2.Qh5#
      • 1...Bf5!
    • 1.Qh8+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxd5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qf4#
      • 1...Rd4+
        • 2.Bb4#
      • 1...Kd4
        • 2.Bf6#
      • 1...Ke4
        • 2.Qf4#
      • 1...Rxd5
        • 2.Bc5#
      • 1...Be4
        • 2.Qf6#
      • 1...Bf5
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(I);CHECK
      • Refutation
        • K(c);P-FLIGHT,XP(E)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • S(f);XP(F)::QAR1(I)
      • Refutation
        • B(e);
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(I)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
  • Actual
    • R(D);
    • Threat
      • QAB1(I)
    • Vars
      • R(a);CHECK,SBLOCK::R(H)+B(G)
      • K(c);S_FLIGHT::B(G)
      • K(c);P-FLIGHT::QAR1(I)
      • R(a);P_SPINR(a),SBLOCK,XP(E)::R(H)+B(G)
      • B(e);SBLOCK::QAB1(I)
      • B(e);SBLOCK::R(H)+B(G),DCHECK
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