MESON Chess Problem Database

Problem Display
PID: 23560 (8/8/8/3Q4/1p6/2pP4/2k5/R3K3 w Q - 0 1)

Forster, Klaus

Lincoln, Robert A

The Problemist, 1993

8/8/8/3Q4/1p6/2pP4/2k5/R3K3

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qa2#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qa2#
      • 1...Kb2
        • 2.Qa2#
      • 1...b3!
    • 1.Rd1?
      • threat
        • 2.Qa2#
      • 1...b3
        • 2.Qg2#
      • 1...Kb2!
    • 1.Qg2+?
      • 1...Kb3
        • 2.Qa2#
      • 1...Kxd3!
    • 1.Qc4?
      • 1...Kb2
        • 2.Qa2#
      • 1...b3!
  • Keys
    • 1.Qe6!
      • 1...Kb2
        • 2.Qa2#
      • 1...Kxd3
        • 2.0-0-0#
      • 1...b3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR2(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Threat
        • QAR2(D)
      • Vars
        • P(c);SBLOCK::QAR(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT,XP(C)::0-0-0
      • P(c);SBLOCK::QAR2(D)
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