MESON Chess Problem Database

Problem Display
PID: 270839 (7B/1B6/2p2r1p/3k1P1R/6p1/Q2P1NP1/1P3K2/8 w - - 0 1)

Thomson, Robert Gavin

Sunday Referee, 1932

(First published on Sun Jun 5 1932)

7B/1B6/2p2r1p/3k1P1R/6p1/Q2P1NP1/1P3K2/8

#2

10 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qa5#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qe5#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Re6
        • 2.fxe6#
      • 1...gxf3!
  • Keys
    • 1.Sd4!
      • 1...Rxf5+
        • 2.Rxf5#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Ke5
        • 2.Qc5#
      • 1...Re6
        • 2.fxe6#
      • 1...Rd6
        • 2.Qa5#
      • 1...Rg6
        • 2.fxg6#
      • 1...Rf7
        • 2.Bxc6#
      • 1...Rf8
        • 2.Bxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAR(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(d);OGATE,P_PINS(E),P_SPINR(d),XP(G)::R(H),XR(d)
        • R(d);OGATE::R(H)+P(G),XR(d)
      • Refutation
        • P(a);XS(E)
  • Actual
    • S(E);P_SPINP(G)
    • Vars
      • R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R(H),XR(d)
      • K(b);N_GUARD,N_SPINP(c),P-FLIGHT,P_SPINR(d),XS(E)::QAR2(C)
      • K(b);N_GUARD,N_SPINP(c),P-FLIGHT,P_SPINR(d)::QAR2(C)
      • R(d);N_PINP(G)::R(H)+P(G),XR(d)
      • R(d);N_PINP(G),SBLOCK::QAR(C)
      • R(d);N_GUARD::B(I),XP(c)
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