MESON Chess Problem Database

Problem Display
PID: 169167 (3b2r1/Q1pP3b/nNk1P3/1p1R3P/2p2B2/8/6R1/2K4B w - - 0 1)

Markovtsy, Vassyl Yuriovich

2nd HM., SuperProblem 162. TT, 2016

3b2r1/Q1pP3b/nNk1P3/1p1R3P/2p2B2/8/6R1/2K4B

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...cxb6
      • 2.Qa8#
  • Tries
    • 1.Rg6?
      • threat
        • 2.Rf5#
        • 2.Rdg5#
      • 1...Rxg6
        • 2.Rg5#
      • 1...Bxg6
        • 2.Rf5#
      • 1...Bg5
        • 2.Rf5#
        • 2.Rdxg5#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sb4!
    • 1.Rd6+?
      • 1...Kc5
        • 2.Sd5#
      • 1...cxd6!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Qa8#
      • 1...Kxd5
        • 2.Rg6#
      • 1...Sc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE::PXR(h)=Q
    • P(e);SBLOCK,XS(G)::QAB(I)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XR(C)::B(B)+R(E)
        • B(f);XR(C)::B(B)+R(E)
        • S(c);SBLOCK::B(B)+R(E),DCHECK
      • Refutation
        • S(c);
    • Try
      • R(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(I)+S(G)
      • Refutation
        • P(e);XR(E)
  • Actual
    • S(G);
    • Threat
      • QAB(I)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::B(B)+R(C)
      • S(c);N_GUARD::R1(E),XS(c)
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