MESON Chess Problem Database

Problem Display
PID: 106811 (6b1/R4p2/4Nk2/3Pp2B/7p/4pKpP/8/Q7 w - - 0 1)

Morse, Christopher Jeremy

London Evening News, 1968

6b1/R4p2/4Nk2/3Pp2B/7p/4pKpP/8/Q7

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Rxf7#
  • Tries
    • 1.Ke4?
      • threat
        • 2.Qxe5#
        • 2.Qf1#
      • 1...fxe6
        • 2.Qxe5#
      • 1...e2
        • 2.Qxe5#
      • 1...g2
        • 2.Qxe5#
      • 1...Bh7+!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Ke2#
        • 2.Kg2#
        • 2.Kxe3#
        • 2.Ke4#
        • 2.Kg4#
      • 1...e4+
        • 2.Kxe4#
      • 1...Kf5
        • 2.Kxe3#
      • 1...fxe6
        • 2.Kg4#
      • 1...g2
        • 2.Kxg2#
      • 1...Bh7
        • 2.Rxf7#
      • 1...e2
        • 2.Kxe2#

There are these versions: 145019

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD::R1(G),XP(f)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(F)::QAB1(A),XP(d)
        • P(a);::QAB1(A),XP(d)
        • P(b);::QAB1(A),XP(d)
      • Refutation
        • B(g);CHECK
  • Actual
    • Q(A);N_PINP(d)
    • Threat
      • DUALS(5)
    • Vars
      • P(d);CHECK::QAR(A)+K(B),XP(d)
      • K(e);P-FLIGHT::QAR(A)+K(B),XP(a)
      • P(f);XS(F)::QAR(A)+K(B)
      • P(b);::QAR(A)+K(B),XP(b)
      • B(g);N_GUARD::R1(G),XP(f)
      • P(a);::QAR(A)+K(B),XP(a)
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