MESON Chess Problem Database

Problem Display
PID: 143009 (7B/1p1R4/2Pbp3/K2k1q2/1P3P1p/pr1N1p2/bpQ1NP2/3R4 w - - 0 1)

Palmer, CC

Western Morning News, 1931

(First published on Sat Mar 28 1931)

7B/1p1R4/2Pbp3/K2k1q2/1P3P1p/pr1N1p2/bpQ1NP2/3R4

#2

11 + 11

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4+
      • 2.Sc5#
    • 1...Qe4
      • 2.Qc5#
    • 1...Qxf4
      • 2.Sdxf4#
    • 1...Rxb4
      • 2.Sxb4#
  • Tries
    • 1.Sxb2+?
      • 1...Qd3
        • 2.Qc4#
      • 1...Rd3!
    • 1.Se5+?
      • 1...Qd3
        • 2.Qc4#
      • 1...Rd3!
    • 1.Rxd6+?
      • 1...Ke4+
        • 2.Sc5#
      • 1...Kxd6+!
  • Keys
    • 1.Kb5!
      • threat
        • 2.Qc4#
      • 1...Ke4+
        • 2.Sc5#
      • 1...Rxb4+
        • 2.Sxb4#
      • 1...bxc6+
        • 2.Qxc6#
      • 1...Qxf4
        • 2.Sdxf4#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Qe4
        • 2.Qc5#
      • 1...Rc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);CHECK,N_SPINB(i),S_FLIGHT::QAB(B)+S(E),DCHECK
    • Q(h);SBLOCK::QAR1(B)
    • Q(h);XP(G)::R(A)+S(E),DCHECK,XQ(h)
    • R(d);XP(F)::R(A)+S(E),DCHECK,XR(d)
  • Tries
    • Try
      • S(E);CHECK,XP(b)
      • Vars
        • Q(h);P_SPINQ(h)::QAB1(B)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • S(E);CHECK
      • Vars
        • Q(h);P_SPINQ(h)::QAB1(B)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • R(J);CHECK,XB(i)
      • Vars
        • K(g);CHECK,S_FLIGHT::QAB(B)+S(E),DCHECK
      • Refutation
        • K(g);CHECK,P-FLIGHT,XR(J)
  • Actual
    • K(H);P-FLIGHT,P_SPINP(F)
    • Threat
      • QAB1(B)
    • Vars
      • K(g);CHECK,N_SPINB(i),S_FLIGHT::QAB(B)+S(E),DCHECK
      • R(d);CHECK,XP(F)::R(A)+S(E),DCHECK,XR(d)
      • P(k);CHECK,OGATE,XP(I)::QAB1(B),XP(k)
      • Q(h);XP(G)::R(A)+S(E),DCHECK,XQ(h)
      • R(d);N_GUARD,N_PINP(F),P_SPINR(d),XS(E)::S(C)
      • Q(h);SBLOCK::QAR1(B)
      • R(d);N_GUARD,N_PINP(F)::S(C),XR(d)
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