MESON Chess Problem Database

Problem Display
PID: 132088 (b1Q1K3/2pNP3/3k1p2/n1Np1r2/3p4/B7/8/8 w - - 0 1)

Sumner, Christopher Richard Benson

The Field, 1955

(First published on Mon Sep 19 1955)

b1Q1K3/2pNP3/3k1p2/n1Np1r2/3p4/B7/8/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa6#
    • 1...c6
      • 2.Qb8#
  • Tries
    • 1.Sb3+?
      • 1...Kc6
        • 2.Sxd4#
        • 2.Qa6#
      • 1...Ke6
        • 2.Sxd4#
      • 1...c5!
    • 1.Sd3+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke6
        • 2.S7e5#
        • 2.Sb6#
        • 2.Sb8#
        • 2.Sf8#
      • 1...c5!
    • 1.Se4+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke6!
    • 1.Sb7+?
      • 1...Ke6
        • 2.Sd8#
      • 1...Kc6!
    • 1.Se5?
      • threat
        • 2.Qe6#
      • 1...Kxe5
        • 2.Qxc7#
      • 1...Rxe5
        • 2.Qd7#
      • 1...c6
        • 2.Sf7#
        • 2.Qb8#
      • 1...Bc6+!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Qe6#
      • 1...Bc6+
        • 2.Scd7#
      • 1...Ke5
        • 2.Qxc7#
      • 1...Kc6
        • 2.Qa6#
      • 1...Re5
        • 2.Qd7#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,P_SPINP(g)::QAR2(E)
    • P(g);OGATEB,SBLOCK::QAB(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(B),XP(a)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(g)::QAR2(E)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(g)::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(B)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(g)
    • Try
      • S(C);
      • Threat
        • QAR1(E)
      • Vars
        • K(e);S_FLIGHT,XS(C)::QAB(E),XP(g)
        • R(d);P_PINP(D),SBLOCK,XS(C)::QAR1(E)
      • Refutation
        • B(h);CHECK
  • Actual
    • S(C);
    • Threat
      • QAR1(E)
    • Vars
      • B(h);CHECK,SBLOCK,S_CUTP(g)::B(A)+S(B)
      • K(e);S_FLIGHT::QAB(E),XP(g)
      • K(e);P-FLIGHT,P_SPINP(g)::QAR2(E)
      • R(d);P_PINP(D),SBLOCK::QAR1(E)
      • P(g);OGATEB,SBLOCK::QAB(E)
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