MESON Chess Problem Database

Problem Display
PID: 206972 (2K1Q3/k1p5/1bR5/2B5/8/8/8/8 w - - 0 1)

Bogel, Karl

Deutsche Schachblatter, 1927

2K1Q3/k1p5/1bR5/2B5/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bxb6+?
      • 1...Ka6
        • 2.Qe2#
      • 1...Ka8
        • 2.Kxc7#
      • 1...cxb6!
    • 1.Rxb6?
      • threat
        • 2.Qa4#
      • 1...Ka8
        • 2.Ra6#
        • 2.Rb8#
        • 2.Qa4#
      • 1...c6!
    • 1.Rxc7+?
      • 1...Ka8
        • 2.Kd7#
        • 2.Qc6#
        • 2.Qe4#
      • 1...Ka6!
    • 1.Qe2?
      • threat
        • 2.Qa2#
      • 1...Bxc5
        • 2.Ra6#
        • 2.Qa6#
      • 1...Ka8!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Ka8
        • 2.Rxc7#

FEATURES

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