MESON Chess Problem Database

Problem Display
PID: 177965 (1n5K/2Rp4/p1P5/rkN5/8/p7/3Q1B2/2Rb4 w - - 0 1)

Slesarenko, Anatoly Vasilevich

3rd HM., Sahs (Latvia), 1987

1n5K/2Rp4/p1P5/rkN5/8/p7/3Q1B2/2Rb4

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc6
      • 2.Rb7#
    • 1...dxc6
      • 2.Rb7#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Ra4
        • 2.Rb7#
      • 1...Sxc6!
    • 1.Be1?
      • threat
        • 2.Qb4#
        • 2.Qxa5#
      • 1...Kb6
        • 2.Qxa5#
      • 1...Sxc6
        • 2.Rb7#
      • 1...Bc2
        • 2.Qb4#
      • 1...Ra4!
    • 1.Rb1+?
      • 1...Kc4
        • 2.Rb4#
        • 2.Qd3#
        • 2.Qd4#
      • 1...Bb3!
    • 1.Qb2+?
      • 1...Bb3
        • 2.Qxb3#
      • 1...axb2!
    • 1.Qd3+?
      • 1...Kb4
        • 2.Be1#
        • 2.Qc4#
      • 1...Kb6!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Rb7#
      • 1...Kb4
        • 2.Qc4#
      • 1...Kb6
        • 2.Rb7#
      • 1...Ra4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(g);SBLOCK,XP(E)::R(F)
    • P(f);SBLOCK,XP(E)::R(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(d);S_FLIGHT::QAR1(B)
        • R(c);SBLOCK::R(F)
      • Refutation
        • S(g);XP(E)
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAB1(B),XR(c)
        • S(g);SBLOCK,XP(E)::R(F)
        • B(a);::QAR1(B)
      • Refutation
        • R(c);
    • Try
      • R(A);CHECK
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(B),XB(a)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R(F)
    • Vars
      • K(d);P-FLIGHT::QAR1(B)
      • K(d);P-FLIGHT::R1(F)
      • R(c);SBLOCK::QAR(B)+S(D)
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