MESON Chess Problem Database

Problem Display
PID: 177790 (1r3b2/1RN5/2p5/P1kPP3/np1p4/nK1Q4/8/8 w - - 0 1)

Novitski, Petr Adrinovich

Vasilenko, Anatoly Grigorovich

3rd HM., Sahs (Latvia), 1988

1r3b2/1RN5/2p5/P1kPP3/np1p4/nK1Q4/8/8

#2

7 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sb5
      • 2.Qc4#
  • Tries
    • 1.Qa6?
      • threat
        • 2.Qxc6#
      • 1...cxd5
        • 2.Se6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...d3!
    • 1.Qf3?
      • threat
        • 2.Sa6#
        • 2.Se6#
      • 1...Rxb7
        • 2.Qxf8#
      • 1...cxd5
        • 2.Qxd5#
      • 1...d3
        • 2.Se6#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Ra8
        • 2.Se6#
      • 1...Re8
        • 2.Sa6#
      • 1...Sb6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxc6#
      • 1...cxd5
        • 2.Sa6#
      • 1...d3
        • 2.Qg1#
      • 1...Bd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(f)
      • Vars
        • P(f);SBLOCK,XP(D)::S(G)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);N_GUARD,XR(F)::QAB(B),XB(h)
        • P(f);OGATE,XP(D)::QAR1(B),XP(f)
        • R(g);::S(G)
      • Refutation
        • S(b);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(f)
    • Vars
      • P(f);SBLOCK,XP(D)::S(G)
      • P(d);OGATEB::QAB(B)
      • B(h);N_GUARD::QAB1(B),XB(h)
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