MESON Chess Problem Database

Problem Display
PID: 158507 (n7/7R/p3p3/K1kpBP2/2p1B3/P5Q1/2P5/2R5 w - - 0 1)

Andrew, Frederick William

Sp. Comm., The Schoolmaster, 1894

(First published on Sat Oct 27 1894)

n7/7R/p3p3/K1kpBP2/2p1B3/P5Q1/2P5/2R5

#2

9 + 6

15351 SCPF/BCPS Black Books 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
    • 1...c3
      • 2.Qxc3#
    • 1...d4
      • 2.Bd6#
  • Tries
    • 1.Qf2+?
      • 1...d4
        • 2.Qxd4#
      • 1...Kc6!
    • 1.Qg1+?
      • 1...d4
        • 2.Qxd4#
      • 1...Kc6!
    • 1.Qe3+?
      • 1...d4
        • 2.Qxd4#
      • 1...Kc6!
  • Keys
    • 1.Qd3!
      • 1...Kc6
        • 2.Qxc4#
      • 1...cxd3
        • 2.cxd3#
      • 1...dxe4
        • 2.Qd6#
      • 1...exf5
        • 2.Qxd5#
      • 1...Sb6
        • 2.Rc7#
      • 1...Sc7
        • 2.Rxc7#
      • 1...c3
        • 2.Qxc3#
      • 1...d4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::R(I)
    • S(f);N_GUARD::R(I),XS(f)
    • P(a);OGATEB::QAR2(D),XP(a)
    • P(c);SBLOCK::B(G)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(D),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(D),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(D),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::QAR2(D),XP(a)
      • P(a);OGATE,XQ(D)::R(A)+P(B),XP(a)
      • P(c);OGATE,XB(E)::QAB1(D)
      • P(e);N_GUARD,XP(H)::QAR1(D),XP(c)
      • S(f);N_GUARD::R(I)
      • S(f);N_GUARD::R(I),XS(f)
      • P(a);OGATEB::QAR2(D),XP(a)
      • P(c);::QAB1(D),XP(c)
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