MESON Chess Problem Database

Problem Display
PID: 134165 (8/pKP5/B1P5/kN2B1R1/2P5/p1P5/1Nn1b2b/R2r2Q1 w - - 0 1)

Alekseev, Yuri Mikhailovich

Kriuckov, Aleksandr

StrateGems, 2009

8/pKP5/B1P5/kN2B1R1/2P5/p1P5/1Nn1b2b/R2r2Q1

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Se1
      • 2.Rxa3#
    • 1...Se3
      • 2.Rxa3#
    • 1...Sb4
      • 2.Rxa3#
    • 1...Sd4
      • 2.Rxa3#
  • Tries
    • 1.Sxa7?
      • threat
        • 2.Qc5#
        • 2.Qb6#
      • 1...Rxg1
        • 2.Bg3#
      • 1...Bxc4
        • 2.Qb6#
      • 1...Bxg1
        • 2.Bd4#
      • 1...Rd5
        • 2.Qb6#
      • 1...Se3
        • 2.Rxa3#
      • 1...Sd4
        • 2.Rxa3#
      • 1...Rd4!
  • Keys
    • 1.Sxa3!
      • threat
        • 2.Qc5#
      • 1...Rxg1
        • 2.Bg3#
      • 1...Bxc4
        • 2.Saxc4#
      • 1...Bxg1
        • 2.Bd4#
      • 1...Rd4
        • 2.Sxc2#
      • 1...Rd5
        • 2.Sxc2#
      • 1...Se3
        • 2.Sb1#
      • 1...Sd4
        • 2.Sb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE::PXR(a)=Q
    • S(b);N_GUARD::R(A),XP(e)
  • Tries
    • Try
      • S(F);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,XQ(B)::R(H)+B(G)
        • B(c);XP(E)::QAB1(B)
        • B(d);N_GUARD,XQ(B)::R(H)+B(G)
        • R(a);::QAB1(B)
        • S(b);N_GUARD::R(A),XP(e)
      • Refutation
        • R(a);
  • Actual
    • S(F);XP(e)
    • Threat
      • QAR2(B)
    • Vars
      • R(a);N_GUARD,XQ(B)::R(H)+B(G)
      • B(c);XP(E)::R(A)+S(F),DCHECK,XB(c)
      • B(d);N_GUARD,XQ(B)::R(H)+B(G)
      • R(a);N_GUARD::R(A)+S(F),XS(b)
      • S(b);N_GUARD::R(A)+S(F)
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Developed and maintained by Brian Stephenson.
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