MESON Chess Problem Database

Problem Display
PID: 106775 (B4R2/B4q2/3p4/2rP1r2/R7/2pQPk2/6pP/6K1 w - - 0 1)

Allison, Christopher John

The Field, 1955

(First published on Thu Apr 21 1955)

B4R2/B4q2/3p4/2rP1r2/R7/2pQPk2/6pP/6K1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Rxf5#
    • 1...Qe8
      • 2.Rxf5#
    • 1...Qg8
      • 2.Rxf5#
    • 1...Qxa7
      • 2.Rxf5#
    • 1...Qb7
      • 2.Rxf5#
    • 1...Qc7
      • 2.Rxf5#
    • 1...Qe7
      • 2.Rxf5#
    • 1...Qg7
      • 2.Rxf5#
    • 1...Ra5
      • 2.Qd1#
    • 1...Rb5
      • 2.Qd1#
    • 1...Rcxd5
      • 2.Qd1#
    • 1...Rc6
      • 2.Qd1#
    • 1...Rc7
      • 2.Qd1#
    • 1...Rc8
      • 2.Qd1#
    • 1...Rfxd5
      • 2.Rxf7#
  • Tries
    • 1.e4+?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kg4!
  • Keys
    • 1.Rh4!
      • threat
        • 2.e4#
      • 1...Qxd5
        • 2.Rxf5#
      • 1...Rcxd5
        • 2.Qd1#
      • 1...Rfxd5
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • Q(g);OGATE,P_SPINQ(g),P_SPINR(e),XP(F)::R(I),XR(e)
    • Q(g);OGATE,P_SPINR(e)::R(I),XR(e)
    • Q(g);OGATE,P_SPINR(e),XB(G)::R(I),XR(e)
    • R(d);::QAB(C)
    • R(d);P_SPINR(d),XP(F)::QAB(C)
    • R(e);OGATEB,P_SPINQ(g),P_SPINR(e),XP(F)::R(I),XQ(g)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • QAR(C)+P(D)
    • Vars
      • Q(g);OGATE,P_SPINQ(g),P_SPINR(e),XP(F)::R(I),XR(e)
      • R(d);P_SPINR(d),XP(F)::QAB(C)
      • R(e);OGATEB,P_SPINQ(g),P_SPINR(e),XP(F)::R(I),XQ(g)
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