MESON Chess Problem Database

Problem Display
PID: 150317 (3b2K1/7P/3P1R2/1prPk2P/5R2/2ppNPNp/4nB1Q/2r5 w - - 0 1)

Shanshin, Valery Yurevich

Vakhlakov, Yuri Nikolaevich

3/4 Prize, Shakhmatnaya kompozitsiya, 2001

3b2K1/7P/3P1R2/1prPk2P/5R2/2ppNPNp/4nB1Q/2r5

#2

12 + 9

15174 FIDE Album (2001-2003) 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Sg4#
  • Tries
    • 1.Sc4+?
      • 1...Rxc4
        • 2.R4f5#
      • 1...bxc4
        • 2.R4f5#
      • 1...Kxd5!
    • 1.Sgf1?
      • threat
        • 2.Re6#
      • 1...Rxd5
        • 2.Sg4#
      • 1...Bxf6
        • 2.Re4#
      • 1...Sxf4
        • 2.Qxf4#
      • 1...Sd4
        • 2.R4f5#
      • 1...Sg3!
    • 1.Sxe2?
      • threat
        • 2.R4f5#
        • 2.Re6#
      • 1...Rxd5
        • 2.Sg4#
        • 2.R4f5#
      • 1...Bxf6
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Re4#
        • 2.Rg4#
        • 2.Rh4#
        • 2.Rf5#
      • 1...dxe2
        • 2.Re6#
      • 1...Rg1+!
    • 1.Rh4?
      • threat
        • 2.Re6#
      • 1...Kxf6
        • 2.Se4#
      • 1...Rxd5
        • 2.Sg4#
      • 1...Bxf6
        • 2.Sxe2#
      • 1...Sd4
        • 2.Se4#
      • 1...Sf4!
    • 1.h8Q?
      • threat
        • 2.Re4#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Sxf4
        • 2.Re6#
      • 1...Rc4!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sg4#
      • 1...Kxd4
        • 2.Sgf5#
      • 1...Kxf6
        • 2.Se4#
      • 1...Bxf6
        • 2.Sxe2#
      • 1...Sxd4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK,XP(G)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(g);XS(C)::R1(F)
        • P(f);XS(C)::R1(F)
      • Refutation
        • K(h);P-FLIGHT,XP(G)
    • Try
      • S(E);
      • Threat
        • R1(J)
      • Vars
        • R(g);SBLOCK,XP(G)::S(C)
        • B(i);SBLOCK,XR(J)::QAB(B)+R(F),DCHECK
        • S(b);OGATE,P_SPINS(b),XR(F)::QAB1(B),XS(b)
        • S(b);SBLOCK::QAB(B)+R(F),DCHECK
      • Refutation
        • S(b);
    • Try
      • S(E);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);XS(E)::R1(J)
      • Refutation
        • R(a);CHECK
    • Try
      • R(F);
      • Threat
        • R1(J)
      • Vars
        • K(h);S_FLIGHT,XR(J)::S(E)
        • R(g);SBLOCK,XP(G)::S(C)
        • B(i);SBLOCK,XR(J)::QAB(B)+S(E),XS(b)
        • S(b);N_GUARD,SBLOCK::QAB(B)+S(E)
      • Refutation
        • S(b);
    • Try
      • P(K);
      • Threat
        • R1(F)
      • Vars
        • B(i);OGATE,P_SPINB(i),XR(J)::QAB1(K),XB(i)
        • S(b);SBLOCK,XR(F)::QAB(K)+R(J),DCHECK
      • Refutation
        • R(g);
  • Actual
    • R(F);
    • Threat
      • S(C)
    • Vars
      • K(h);S_FLIGHT,XR(F)::S(E)
      • K(h);S_FLIGHT,XR(J)::S(E)
      • B(i);SBLOCK,XR(J)::QAB(B)+S(E),XS(b)
      • S(b);N_GUARD,SBLOCK,XR(F)::QAB(B)+S(E)
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