MESON Chess Problem Database

Problem Display
PID: 184252 (kr6/1pP5/B1P5/2Q5/2K5/2p5/8/8 w - - 0 1)

Keeble, John Frederick

British Chess Magazine, 1916

kr6/1pP5/B1P5/2Q5/2K5/2p5/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.Bxb7#
      • 2.cxb7#
    • 1...Rd8
      • 2.Bxb7#
      • 2.cxb7#
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Re8
      • 2.Bxb7#
      • 2.cxb7#
    • 1...Rf8
      • 2.Bxb7#
      • 2.cxb7#
    • 1...Rg8
      • 2.Bxb7#
      • 2.cxb7#
    • 1...Rh8
      • 2.Bxb7#
      • 2.cxb7#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Bb5#
        • 2.Bxb7#
      • 1...b5+
        • 2.Bxb5#
      • 1...bxa6
        • 2.Qxa6#
      • 1...bxc6
        • 2.Bc8#
      • 1...b6
        • 2.Bb5#
        • 2.Bb7#
        • 2.Bc8#
      • 1...Ka7!
    • 1.Qb6?
      • 1...bxa6
        • 2.Qxa6#
        • 2.Qxb8#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...bxc6
        • 2.Qxb8#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Rc8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
      • 1...Rd8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Re8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
      • 1...Rf8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
      • 1...Rg8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
      • 1...Rh8
        • 2.Bxb7#
        • 2.Qxb7#
        • 2.cxb7#
      • 1...c2!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Bb5#
        • 2.Bxb7#
      • 1...b5+
        • 2.Bxb5#
      • 1...Ka7
        • 2.Bb5#
        • 2.Bxb7#
      • 1...bxa6
        • 2.Qxa6#
      • 1...bxc6
        • 2.Bc8#
      • 1...b6
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK::QAR(B)+B(C),XP(b)
        • P(b);OGATE,P_SPINP(b),XB(C)::QAR2(B),XP(b)
        • P(b);OGATE,XP(D)::QAR(B)+B(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);CHECK::QAR(B)+B(C),XP(b)
      • P(b);OGATE,P_SPINP(b),XB(C)::QAR2(B),XP(b)
      • P(b);OGATE,XP(D)::QAR(B)+B(C)
      • P(b);::QAR(B)+B(C),DCHECK
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