MESON Chess Problem Database

Problem Display
PID: 445 (6Q1/3pKN2/2pP2R1/3k2P1/R2p1b2/3Np1P1/4P3/1B6 w - - 0 1)

Mansfield, Comins

The Observer, 1954

(First published on Sun Nov 7 1954)

6Q1/3pKN2/2pP2R1/3k2P1/R2p1b2/3Np1P1/4P3/1B6

#2

11 + 6

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sxf4#
    • 1...Bxg5+
      • 2.Sxg5#
    • 1...Bxd6+
      • 2.Sxd6#
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.gxf4?
      • 1...c5
        • 2.Qa8#
      • 1...Ke4!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qh1#
      • 1...Bxg5+
        • 2.Rxg5#
      • 1...Bxd6+
        • 2.Rxd6#
      • 1...Ke4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINP(b),S_FLIGHT::B(A)+S(C),XB(c)
    • B(c);CHECK,XP(F)::QAB(K)+S(J),XB(c)
    • B(c);CHECK,XP(G)::QAB(K)+S(J),XB(c)
    • P(e);OGATEB::QAB(K)
  • Tries
    • Try
      • P(D);XB(c)
      • Vars
        • P(e);OGATEB::QAB(K)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(K);
    • Threat
      • QAB(K)
    • Vars
      • B(c);CHECK,OGATE,XP(F)::R(H),XB(c)
      • B(c);CHECK,OGATE,XP(G)::R1(H),XB(c)
      • K(d);P_SPINP(b),S_FLIGHT::B(A)+S(C),XB(c)
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