MESON Chess Problem Database

Problem Display
PID: 173251 (r7/B1pb1B2/2p5/2nPpNp1/4k1r1/1pQNP1p1/6K1/2R5 w - - 0 1)

Permyakov, Evgeni Nikolaevich

1st Prize, Problemist Ukraini, 2014

r7/B1pb1B2/2p5/2nPpNp1/4k1r1/1pQNP1p1/6K1/2R5

#2

9 + 11

56 The Problemist 2017
17262 FIDE Album (2013-2015) 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qxe5#
    • 1...Bxf5
      • 2.Sxc5#
  • Tries
    • 1.Sxg3+?
      • 1...Kxe3
        • 2.Re1#
      • 1...Rxg3+!
    • 1.Sd6+?
      • 1...Kxe3
        • 2.Re1#
      • 1...cxd6!
    • 1.Bg6?
      • threat
        • 2.Qc4#
      • 1...Kxd5
        • 2.Qxe5#
      • 1...cxd5
        • 2.Sxc5#
      • 1...Se6
        • 2.Se7#
      • 1...Bxf5!
    • 1.Rd1?
      • threat
        • 2.Qxe5#
      • 1...Kxf5
        • 2.Qxe5#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Re8!
    • 1.Qd4+?
      • 1...Kxf5
        • 2.Qxe5#
      • 1...exd4!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sxc5#
      • 1...Kxe3
        • 2.Re1#
      • 1...Sxd3
        • 2.Qc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sa6
        • 2.Qc4#
      • 1...Se6
        • 2.Bg6#
      • 1...Sb7
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • K(c);S_FLIGHT,XS(G)::QAR1(C),XP(f)
    • B(j);SBLOCK,XS(G)::S(D),XS(e)
  • Tries
    • Try
      • S(G);CHECK,P_SPINS(G),XP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(e),XP(E)::R(A)
      • Refutation
        • R(d);CHECK,XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(e),XP(E)::R(A)
      • Refutation
        • P(i);XS(G)
    • Try
      • B(I);
      • Threat
        • QAR2(C)
      • Vars
        • K(c);S_FLIGHT,XP(F)::QAR1(C),XP(f)
        • P(h);SBLOCK,XP(F)::S(D),XS(e)
        • S(e);S_CUTB(j)::B(I)+S(G)
      • Refutation
        • B(j);P_SPINB(j),XS(G)
    • Try
      • R(A);
      • Threat
        • QAR1(C),XP(f)
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAR1(C),XP(f)
        • S(e);OGATE,XS(D)::QAB1(C),XS(e)
      • Refutation
        • R(k);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAR1(C),XP(f)
      • Refutation
        • P(f);XQ(C)
  • Actual
    • S(G);
    • Threat
      • S(D),XS(e)
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINS(e),XP(E)::R(A)
      • S(e);XS(D)::QAR2(C)
      • S(e);::QAR2(C)
      • S(e);S_CUTB(j)::B(I)
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