MESON Chess Problem Database

Problem Display
PID: 110088 (4R2n/1p3r2/1K2Bp1Q/4P3/1p1k4/B7/5N2/b7 w - - 0 1)

Kisis, Imants J

Sahs, 1979

4R2n/1p3r2/1K2Bp1Q/4P3/1p1k4/B7/5N2/b7

#2

7 + 7

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Bxb2#
    • 1...Bc3
      • 2.Qf4#
    • 1...fxe5
      • 2.Qd2#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qe3#
      • 1...fxe5
        • 2.Qd2#
      • 1...Sg6!
    • 1.Bb3?
      • threat
        • 2.Qd2#
      • 1...Kc3
        • 2.Qe3#
      • 1...Bc3
        • 2.Qf4#
      • 1...Re7!
    • 1.Rd8+?
      • 1...Kc3
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kxe5
        • 2.Qe3#
      • 1...Rd7!
  • Keys
    • 1.Bc1!
      • threat
        • 2.Qe3#
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxe5
        • 2.Qf4#

This anticipates 22548(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);SBLOCK::QAR2(F)
    • P(d);SBLOCK,XP(C)::QAR2(F)
  • Tries
    • Try
      • B(B);XP(b)
      • Threat
        • QAR2(F)
      • Vars
        • K(c);S_FLIGHT,XP(C)::QAR2(F)
        • P(d);SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • S(g);
    • Try
      • B(E);
      • Threat
        • QAR2(F)
      • Vars
        • K(c);S_FLIGHT::QAR2(F)
        • B(a);SBLOCK::QAR2(F)
      • Refutation
        • R(f);
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(C)::QAR2(F)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • B(B);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);S_FLIGHT::QAB1(F)
      • K(c);S_FLIGHT,XP(C)::QAB1(F)
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