MESON Chess Problem Database

Problem Display
PID: 156476 (K5Q1/8/pP2R3/qk1B4/b3R3/1Pp5/8/8 w - - 0 1)

Ouellet, Charles

The Problemist, 2014

K5Q1/8/pP2R3/qk1B4/b3R3/1Pp5/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Bc4+?
      • 1...Kc5
        • 2.Qf8#
      • 1...Kb4!
    • 1.Bc6+?
      • 1...Kc5
        • 2.Qg1#
      • 1...Kxb6!
    • 1.Qg1?
      • threat
        • 2.Bc6#
      • 1...Qxb6
        • 2.Qxb6#
      • 1...Qb4!
    • 1.Qf8?
      • threat
        • 2.Bc4#
      • 1...Qxb6
        • 2.Qb4#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Bxb3!
    • 1.bxa4+?
      • 1...Kc5
        • 2.Rc6#
      • 1...Qxa4!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Bb7#
      • 1...Kc5
        • 2.Bb7#
      • 1...Qxb6
        • 2.Bc6#
      • 1...Bxb3
        • 2.Bxb3#
      • 1...Qb4
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(G)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(G)
      • Refutation
        • K(d);P-FLIGHT,XP(D)
    • Try
      • Q(G);
      • Threat
        • B(C)
      • Vars
        • Q(c);OGATE,XP(D)::QAR1(G),XQ(c)
      • Refutation
        • Q(c);
    • Try
      • Q(G);
      • Threat
        • B(C)
      • Vars
        • Q(c);N_GUARD,XP(D)::QAR1(G)
        • Q(c);N_GUARD::QAR1(G),XQ(c)
      • Refutation
        • B(b);XP(A)
    • Try
      • P(A);CHECK,XB(b)
      • Vars
        • K(d);P-FLIGHT::R1(E)
      • Refutation
        • Q(c);XP(A)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+B(C)
    • Vars
      • K(d);P-FLIGHT::QAR(G)+B(C)
      • Q(c);SBLOCK,XP(D)::QAR(G)+B(C),DCHECK
      • B(b);OGATE,XP(A)::QAR(G)+B(C),XB(b)
      • Q(c);SBLOCK::QAR(G)+B(C),DCHECK
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