MESON Chess Problem Database

Problem Display
PID: 66919 (b2K4/B2N2p1/4Q1p1/R3Pp2/3Pk1n1/3r1RP1/2P2nP1/8 w - - 0 1)

Shanshin, Valery Yurevich

3/4 Prize, Schach-Aktiv, 1992

b2K4/B2N2p1/4Q1p1/R3Pp2/3Pk1n1/3r1RP1/2P2nP1/8

#2

11 + 8

5416 FIDE Album (1992-1994) (Annexe) 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rf4#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Sd1
      • 2.cxd3#
    • 1...Sh1
      • 2.cxd3#
    • 1...Sh3
      • 2.cxd3#
    • 1...Se3
      • 2.Rf4#
    • 1...Sxe5
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Sf6
      • 2.exf6#
    • 1...f4
      • 2.Qxg6#
    • 1...g5
      • 2.Qxf5#
  • Tries
    • 1.Sf6+?
      • 1...Sxf6
        • 2.exf6#
      • 1...gxf6!
    • 1.Ra4?
      • threat
        • 2.Sc5#
      • 1...Rxf3
        • 2.d5#
      • 1...Rxd4
        • 2.Rxd4#
      • 1...Rc3!
    • 1.Qc4?
      • threat
        • 2.Sc5#
      • 1...Rxf3
        • 2.d5#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...f4!
  • Keys
    • 1.d5!
      • threat
        • 2.Rf4#
      • 1...Rxf3
        • 2.Ra4#
      • 1...Rd4
        • 2.Sc5#
      • 1...Sh3
        • 2.cxd3#
      • 1...f4
        • 2.Rxf4#
        • 2.Qxg6#
      • 1...g5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(b);SBLOCK::R1(C)
    • B(h);N_GUARD::QAB1(H),XB(h)
    • B(h);N_GUARD::QAB(H),XB(h)
    • S(a);N_GUARD::P(A),XR(b)
    • S(d);SBLOCK::R1(C)
    • S(d);OGATE::QAR(H)+P(G),XS(d)
    • P(e);OGATEB::QAB(H),XP(f)
    • P(f);N_GUARD::QAB1(H),XP(e)
  • Tries
    • Try
      • S(J);CHECK,P_SPINP(E)
      • Vars
        • S(d);OGATE,XS(J)::QAR(H)+P(G),XS(d)
      • Refutation
        • P(g);XS(J)
    • Try
      • R(F);
      • Threat
        • S(J)
      • Vars
        • R(b);N_GUARD,XR(C)::R(F)+P(E)
        • R(b);OGATE,P_PINS(J),P_SPINR(b),XP(E)::R1(F),XR(b)
      • Refutation
        • R(b);
    • Try
      • Q(H);
      • Threat
        • S(J)
      • Vars
        • R(b);N_GUARD,XR(C)::QAR(H)+P(E)
        • R(b);OGATE,P_PINS(J),P_SPINR(b),XP(E)::QAR1(H),XR(b)
      • Refutation
        • P(e);
  • Actual
    • P(E);
    • Threat
      • R1(C)
    • Vars
      • R(b);N_GUARD,XR(C)::R(F)
      • R(b);SBLOCK::S(J)
      • S(a);N_GUARD::P(A),XR(b)
      • P(f);N_GUARD::QAB1(H),XP(e)
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