MESON Chess Problem Database

Problem Display
PID: 156448 (8/ppR5/1k6/p3B3/P5r1/3b2P1/1N1KB3/1RQ5 w - - 0 1)

Packer, GFH

BCPS, 1918

8/ppR5/1k6/p3B3/P5r1/3b2P1/1N1KB3/1RQ5

#2

9 + 6

15351 SCPF/BCPS Black Books 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb1
      • 2.Qc5#
    • 1...Be4
      • 2.Bd4#
      • 2.Qg1#
      • 2.Qc5#
    • 1...Bf5
      • 2.Qc5#
    • 1...Ba6
      • 2.Sc4#
      • 2.Qc5#
    • 1...Bg6
      • 2.Qc5#
    • 1...Bh7
      • 2.Qc5#
    • 1...a6
      • 2.Qc5#
  • Tries
    • 1.Sxd3+?
      • 1...Ka6
        • 2.Sc5#
      • 1...Rb4!
    • 1.Rxb7+?
      • 1...Ka6
        • 2.Qc6#
      • 1...Kxb7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxb7#
      • 1...Ka6
        • 2.Qxb7#
      • 1...Re4
        • 2.Qh6#
      • 1...Be4
        • 2.Qg1#
      • 1...Ba6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • B(a);XR(A)::QAB1(B)
    • B(a);::QAB1(B)
    • P(e);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(C);CHECK,XB(a)
      • Vars
        • K(d);P-FLIGHT::B(E)+S(C),DCHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(I);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT,P_SPINB(a)::QAR2(B)
      • Refutation
        • K(d);P-FLIGHT,XR(I)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(f)
    • Vars
      • K(d);P-FLIGHT,P_SPINB(a)::QAB1(B),XP(f)
      • R(b);N_GUARD,S_CUTB(a)::QAR(B)
      • B(a);S_CUTR(b)::QAB(B)
      • B(a);SBLOCK::R(A)+S(C),DCHECK
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