MESON Chess Problem Database

Problem Display
PID: 164611 (2bR3K/4NN2/1n2kpQP/Rp2p2p/4p3/B2P3n/6p1/b7 w - - 0 1)

Shanshin, Valery Yurevich

1st HM., StrateGems, 2015

2bR3K/4NN2/1n2kpQP/Rp2p2p/4p3/B2P3n/6p1/b7

#2

9 + 11

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Sg5#
    • 1...Sf2
      • 2.Sg5#
    • 1...Sf4
      • 2.Sg5#
    • 1...Sg5
      • 2.Sxg5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sc7#
        • 2.Rd6#
        • 2.Qxf6#
      • 1...Bd7
        • 2.Sc7#
      • 1...Sd7
        • 2.Sc7#
      • 1...Sc4
        • 2.Sc7#
        • 2.Qxf6#
      • 1...Sa8
        • 2.Rd6#
        • 2.Qxf6#
      • 1...b4
        • 2.Rd6#
        • 2.Qxf6#
      • 1...Sxd5!
    • 1.Sd6?
      • threat
        • 2.Qf7#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Sg5!
    • 1.Qg4+?
      • 1...Kxf7
        • 2.Qg8#
      • 1...f5
        • 2.Qxf5#
        • 2.Qg6#
      • 1...hxg4!
    • 1.Qg8?
      • threat
        • 2.Sg5#
      • 1...f5
        • 2.Qg6#
      • 1...Sg5
        • 2.Sxg5#
      • 1...b4!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Qf5#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Bxe5
        • 2.Qg8#
      • 1...b4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::S(G)
    • S(c);N_GUARD::S(G),XS(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(k);::S(F)
        • S(h);::S(F)
      • Refutation
        • S(h);XS(F)
    • Try
      • S(G);
      • Threat
        • QAB1(D)
      • Vars
        • K(i);N_SPINP(j),OGATEB,P-FLIGHT,XS(F)::QAR1(D)
      • Refutation
        • S(c);
    • Try
      • Q(D);CHECK,N_PINP(j)
      • Vars
        • K(i);OGATEB,S_FLIGHT,XS(G)::QAB1(D)
      • Refutation
        • P(g);XQ(D)
    • Try
      • Q(D);N_PINP(j)
      • Threat
        • QAB(D)+S(G),DCHECK
      • Vars
        • P(j);OGATEB::QAR2(D)
        • S(c);::QAB(D)+S(G),DCHECK,XS(c)
      • Refutation
        • P(e);
  • Actual
    • S(G);XP(f)
    • Threat
      • QAB1(D)
    • Vars
      • K(i);N_SPINP(j),OGATEB,P-FLIGHT,P_SPINP(e),XS(G)::QAR1(D),XP(d)
      • B(a);SBLOCK,XS(G)::QAB(D)
      • P(e);::QAB1(D)
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