MESON Chess Problem Database

Problem Display
PID: 61925 (8/3rpK1N/2p1P3/2pR1p2/Qnp1k2N/2BR1p2/2pP1PBp/5b1q w - - 0 1)

Dyachuk, Vasyl Vasilovich

Gvozdjak, Peter

1st Prize, Eretria Quick Ty., 2005

8/3rpK1N/2p1P3/2pR1p2/Qnp1k2N/2BR1p2/2pP1PBp/5b1q

#2

11 + 13

5673 Eretria Bulletin 2005
102 Probleemblad 2005
56 The Problemist 2005
145 StrateGems 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qxc4#
    • 1...Sxd3
      • 2.Qxc4#
    • 1...Sxd5
      • 2.Qxc4#
    • 1...Sa6
      • 2.Qxc4#
    • 1...f4
      • 2.Sg5#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Sg5#
      • 1...Rxd5
        • 2.Re3#
      • 1...Bxd3
        • 2.Re5#
      • 1...Sxd3
        • 2.Qxc4#
      • 1...Sxd5
        • 2.Qxc4#
      • 1...cxd3
        • 2.Re5#
      • 1...cxd5
        • 2.Re3#
      • 1...Qxg2!
    • 1.Sf6+?
      • 1...Kf4
        • 2.Rxf5#
      • 1...exf6+!
    • 1.Bxf3+?
      • 1...Kf4
        • 2.Sg6#
        • 2.Be5#
        • 2.Rxf5#
      • 1...Qxf3!
    • 1.Re5+?
      • 1...Kxd3
        • 2.Re3#
      • 1...Kf4!
    • 1.Rxf5?
      • threat
        • 2.Re3#
      • 1...Rxd3
        • 2.Sg5#
      • 1...Bxd3
        • 2.Sg5#
      • 1...Sxd3
        • 2.Sg5#
      • 1...cxd3
        • 2.Sg5#
      • 1...Sd5
        • 2.Qxc4#
      • 1...Kxd3!
  • Keys
    • 1.Rxf3!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Rd3#
      • 1...Rxd5
        • 2.Sg5#
      • 1...Sxd5
        • 2.Sg5#
      • 1...cxd5
        • 2.Sg5#
      • 1...Sd3
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(f);OGATE::QAR2(F),XP(g)
    • S(f);OGATE,XR(E)::QAR2(F),XP(g)
    • S(f);OGATE,XR(H)::QAR2(F),XP(g)
    • P(j);SBLOCK::S(K)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(K)
      • Vars
        • R(l);SBLOCK,XR(H)::R1(E)
        • B(a);SBLOCK,XR(E)::R1(H)
        • S(f);OGATE,XR(E)::QAR2(F),XP(g)
        • S(f);OGATE,XR(H)::QAR2(F),XP(g)
        • P(g);P_SPINS(f),SBLOCK,XR(E)::R1(H)
        • P(k);SBLOCK,XR(H)::R1(E)
      • Refutation
        • Q(b);N_SPINP(e),XB(C)
    • Try
      • S(K);CHECK
      • Vars
        • K(h);N_SPINP(e),P-FLIGHT::R1(H),XP(j)
      • Refutation
        • P(m);CHECK,XS(K)
    • Try
      • B(C);CHECK,XP(e)
      • Refutation
        • Q(b);XB(C)
    • Try
      • R(H);CHECK
      • Vars
        • K(h);N_SPINP(e),OGATE,S_FLIGHT,XR(E)::R1(H)
      • Refutation
        • K(h);N_SPINP(e),P-FLIGHT
    • Try
      • R(H);XP(j)
      • Threat
        • R1(E)
      • Vars
        • R(l);SBLOCK,XR(E)::S(K)
        • B(a);SBLOCK,XR(E)::S(K)
        • S(f);SBLOCK,XR(E)::S(K)
        • P(g);P_SPINS(f),SBLOCK,XR(E)::S(K)
        • S(f);OGATE::QAR2(F),XP(g)
      • Refutation
        • K(h);N_SPINP(e),S_FLIGHT,XR(E)
  • Actual
    • R(E);XP(e)
    • Threat
      • R1(H)
    • Vars
      • K(h);S_FLIGHT,XR(H)::B(C)+R(E),DCHECK
      • R(l);SBLOCK,XR(H)::S(K)
      • S(f);P_SPINP(g),SBLOCK,XR(H)::S(K)
      • P(k);SBLOCK,XR(H)::S(K)
      • S(f);OGATE,P_SPINP(g)::QAR2(F),XP(g)
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