MESON Chess Problem Database

Problem Display
PID: 88113 (7k/6q1/8/4B1R1/2KQ4/8/8/8 w - - 0 1)

Albasi, Mario

The Problemist, 1991

7k/6q1/8/4B1R1/2KQ4/8/8/8

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qh4#
    • 1...Qf6
      • 2.Qh4#
  • Tries
    • 1.Qa7?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Qf6
        • 2.Bxf6#
      • 1...Qxe5!
    • 1.Qd3?
      • 1...Qxe5
        • 2.Qh3#
      • 1...Qf6
        • 2.Bxf6#
        • 2.Qh3#
      • 1...Kg8!
    • 1.Qe4?
      • 1...Qxe5
        • 2.Qh4#
      • 1...Qf6
        • 2.Bxf6#
        • 2.Qh1#
        • 2.Qh4#
      • 1...Kg8!
    • 1.Qd5?
      • threat
        • 2.Rh5#
      • 1...Qxe5
        • 2.Qg8#
      • 1...Qf6
        • 2.Qh1#
        • 2.Qg8#
      • 1...Kh7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Qxe5
        • 2.Qh3#
      • 1...Qf6
        • 2.Bxf6#
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);XB(C)::QAR(B)
    • Q(a);::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XQ(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XQ(a)
        • Q(a);OGATEB::B(C),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XB(C)
    • Try
      • Q(B);
      • Vars
        • Q(a);N_SPINQ(a),XB(C)::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • Q(a);N_SPINQ(a),XB(C)::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • R(D)
      • Vars
        • Q(a);N_SPINQ(a),XB(C)::QAR1(B)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XQ(a)
    • Vars
      • K(b);P-FLIGHT::QAR1(B),XQ(a)
      • Q(a);N_SPINQ(a),XB(C)::QAR(B)
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