MESON Chess Problem Database

Problem Display
PID: 152201 (8/6BK/3P4/R2NPNpQ/3pk3/R2b2PP/3P1n1P/5B1q w - - 0 1)

Shanshin, Valery Yurevich

Comm., The Problemist, 2013

8/6BK/3P4/R2NPNpQ/3pk3/R2b2PP/3P1n1P/5B1q

#2

14 + 6

56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qg6#
    • 1...Sd1
      • 2.Bxd3#
      • 2.Qg4#
    • 1...Sxh3
      • 2.Bxd3#
    • 1...Sg4
      • 2.Qxg4#
  • Tries
    • 1.Sc3+?
      • 1...Kxf5
        • 2.Qg6#
        • 2.Qf7#
      • 1...dxc3!
    • 1.Sh4?
      • threat
        • 2.Sf6#
        • 2.Qg6#
      • 1...gxh4
        • 2.Sf6#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Sg4
        • 2.Bxd3#
        • 2.Qxg4#
        • 2.Qg6#
      • 1...Bb5!
    • 1.Sfe7?
      • threat
        • 2.Sf6#
      • 1...Sg4
        • 2.Qxg4#
      • 1...g4
        • 2.Qf5#
      • 1...Bb5
        • 2.Qg6#
      • 1...Qf3!
    • 1.Bg2+?
      • 1...Kxf5
        • 2.Qg6#
        • 2.Qf7#
      • 1...Qxg2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Sh4#
      • 1...Kf3
        • 2.Sxd4#
      • 1...Qf3
        • 2.Sf6#
      • 1...Bb5
        • 2.Sfe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(e);OGATEB,P_SPINP(f),S_FLIGHT,XS(J)::QAB1(K)
    • S(b);N_GUARD,XP(F)::B(A),XB(c)
    • S(b);N_GUARD::QAR2(K),XS(b)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • P(d);XS(H)
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(J)::S(H)
        • Q(a);N_GUARD::QAB1(K),XQ(a)
      • Refutation
        • B(c);
    • Try
      • S(J);
      • Threat
        • S(H)
      • Vars
        • S(b);N_GUARD::QAR2(K),XS(b)
        • P(f);OGATE::QAB1(K)
        • B(c);::QAB(K)
      • Refutation
        • Q(a);
    • Try
      • B(A);CHECK
      • Refutation
        • Q(a);XB(A)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)+S(J)
    • Vars
      • K(e);P_SPINB(c),S_FLIGHT::S(J),XP(d)
      • Q(a);SBLOCK::S(H)
      • B(c);::QAB(K)+S(J)
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