MESON Chess Problem Database

Problem Display
PID: 108226 (8/1Q1R4/1p6/1k1N4/8/1N6/8/2K5 w - - 0 1)

Bruch, Wieland

Troll, 1991

8/1Q1R4/1p6/1k1N4/8/1N6/8/2K5

#2

5 + 2

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kb2?
      • 1...Ka4
        • 2.Qa6#
      • 1...Kc4!
    • 1.Sd2?
      • 1...Ka4
        • 2.Qa6#
      • 1...Kc5
        • 2.Qxb6#
      • 1...Ka5!
    • 1.Qc6+?
      • 1...Ka6
        • 2.Sb4#
        • 2.Qa4#
        • 2.Qxb6#
      • 1...Kxc6!
    • 1.Qxb6+?
      • 1...Ka4
        • 2.Ra7#
        • 2.Qb4#
      • 1...Kc4!
    • 1.Qc7?
      • 1...Ka6
        • 2.Qxb6#
      • 1...Ka4!
  • Keys
    • 1.Kc2!
      • 1...Ka4
        • 2.Qa6#
      • 1...Kc4
        • 2.Qc6#

Anticipated by 81027(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR2(D)
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);N_SPINP(b),S_FLIGHT::QAR2(D)
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