MESON Chess Problem Database

Problem Display
PID: 79353 (1n4K1/2p5/2Pkp3/3Pp3/1P1NQ3/5P2/8/3R4 w - - 0 1)

Carroll, RD

The Tablet, 1964

(First published on Sat Jun 27 1964)

1n4K1/2p5/2Pkp3/3Pp3/1P1NQ3/5P2/8/3R4

#2

8 + 5

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qxe6#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Sb5#
      • 1...exd4
        • 2.Qxe6#
      • 1...exd5
        • 2.Qg6#
      • 1...Sxc6!
    • 1.Qg6?
      • threat
        • 2.Sf5#
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Sxc6
        • 2.Qxe6#
      • 1...exd4
        • 2.Qxe6#
      • 1...e4
        • 2.Qxe6#
      • 1...Ke7!
    • 1.Qg4?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...exd5
        • 2.Qe6#
      • 1...Ke7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Ke7
        • 2.Qf8#
      • 1...exd5
        • 2.Qe6#
        • 2.Qf6#
        • 2.Qf8#
      • 1...exf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE,XS(D)::QAR1(E),XP(c)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • S(D)
      • Vars
        • P(a);OGATE,XS(D)::QAR1(E),XP(c)
        • P(c);OGATEB,SBLOCK,XP(F)::QAR(E)
      • Refutation
        • S(e);XP(G)
    • Try
      • Q(E);P_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT,XP(F)::QAB1(E),XP(c)
        • S(e);XP(G)::QAR1(E),XP(c)
        • P(a);XS(D)::QAR1(E),XP(c)
        • P(a);::QAR1(E),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(c)
      • Vars
        • K(b);P-FLIGHT,XP(F)::QAB1(E),XP(c)
        • P(c);XP(F)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(c)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a),XP(F)::QAB1(E),XP(c)
      • K(b);S_FLIGHT::QAB1(E)
      • P(c);XQ(E)::S(D),XP(c)
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