MESON Chess Problem Database

Problem Display
PID: 15522 (8/3r1N2/8/8/1P6/1N2k1K1/2Q5/8 w - - 0 1)

Visbeen, Frank

2nd Prize, Buletin Problemistic, 1985

8/3r1N2/8/8/1P6/1N2k1K1/2Q5/8

#2

5 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Rd3
        • 2.Qf2#
      • 1...Re7
        • 2.Qd2#
      • 1...Rd4!
    • 1.Qf2+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kd3!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Rd3
        • 2.Qe1#
        • 2.Qe5#
      • 1...Ke2!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qf2#
      • 1...Kd4
        • 2.Qd3#
      • 1...Rxf7
        • 2.Qd3#
      • 1...Rd2
        • 2.Qe4#

This anticipates 89945(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);SBLOCK::QAB1(A)
        • R(b);N_GUARD::QAB1(A)
      • Refutation
        • R(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • R(b);N_GUARD,XS(E)::QAR1(A)
      • R(b);SBLOCK::QAR1(A)
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