MESON Chess Problem Database

Problem Display
PID: 223272 (8/2p2p2/2p2Q2/2PkBp2/2p2r2/2K2p2/8/8 w - - 0 1)

Collins, Francis Charles

English Mechanic and World of Science, 1886

(First published on Fri Jul 23 1886)

8/2p2p2/2p2Q2/2PkBp2/2p2r2/2K2p2/8/8

#2

4 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bd4?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
        • 2.Qxc6#
      • 1...Rxd4
        • 2.Qxf5#
      • 1...Re4!
    • 1.Bxf4?
      • threat
        • 2.Qe5#
        • 2.Qxf5#
      • 1...Ke4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qd4#
      • 1...cxd6!
  • Keys
    • 1.Bxc7!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxc5
        • 2.Qe5#
      • 1...Re4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(D)
      • Vars
        • R(c);N_GUARD,XB(C)::QAR2(D),XP(e)
      • Refutation
        • R(c);
    • Try
      • B(C);XR(c)
      • Threat
        • DUALS(2)
      • Refutation
        • K(d);P-FLIGHT,XP(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • P(g);XQ(D)
  • Actual
    • B(C);XP(g)
    • Threat
      • QAR1(D)
    • Vars
      • K(d);P-FLIGHT,XP(B)::QAR2(D)
      • R(c);SBLOCK::QAR1(D)
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