MESON Chess Problem Database

Problem Display
PID: 65379 (b2Kn2b/B2Npq1B/4Q3/pR2pP1p/3Pk1n1/r2r1RP1/4P3/1N6 w - - 0 1)

Shanshin, Valery Yurevich

3rd Prize, Hlas l'udu, 1992

b2Kn2b/B2Npq1B/4Q3/pR2pP1p/3Pk1n1/r2r1RP1/4P3/1N6

#2

12 + 12

3681 FIDE Album (1992-1994) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.fxe6#
    • 1...Qxf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...Qf8
      • 2.f6#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rb3
      • 2.Sd2#
    • 1...Rc3
      • 2.Sd2#
    • 1...Re3
      • 2.Sd2#
      • 2.Rf4#
    • 1...Se3
      • 2.Rf4#
    • 1...Sgf6
      • 2.Rxe5#
      • 2.Qxe5#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Sd2#
        • 2.Sc5#
      • 1...Qxe6
        • 2.Sd2#
        • 2.fxe6#
      • 1...Ra2
        • 2.Sc3#
        • 2.Sc5#
      • 1...Rc3
        • 2.Sd2#
        • 2.Sxc3#
      • 1...Rxd3!
    • 1.Qc4?
      • threat
        • 2.Sc5#
      • 1...Qxc4
        • 2.f6#
      • 1...Rxf3
        • 2.d5#
      • 1...Rxd4
        • 2.Sd2#
      • 1...Qd5
        • 2.f6#
      • 1...exd4!
    • 1.Qd5+?
      • 1...Qxd5
        • 2.f6#
      • 1...Bxd5!
    • 1.Qc6+?
      • 1...Qd5
        • 2.f6#
      • 1...Bxc6!
    • 1.f6+?
      • 1...Qg6
        • 2.Bxg6#
      • 1...Qxh7!
  • Keys
    • 1.d5!
      • threat
        • 2.Rf4#
      • 1...Qxe6
        • 2.fxe6#
      • 1...Rxf3
        • 2.Sd2#
      • 1...Rd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_SPINP(f),OGATE,XQ(H)::B(K)+P(G),XQ(i)
    • Q(i);N_GUARD::B(K)+P(G)
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD::S(A)
    • S(d);SBLOCK::R1(C)
  • Tries
    • Try
      • R(C);XR(b)
      • Threat
        • DUALS(2)
      • Refutation
        • R(a);XR(C)
    • Try
      • Q(H);N_PINP(f)
      • Threat
        • S(J)
      • Vars
        • Q(i);N_GUARD,XQ(H)::B(K)+P(G)
        • R(b);N_GUARD,XR(C)::QAR(H)+P(E)
        • R(b);N_GUARD,P_PINS(J),P_SPINR(b),XP(E)::S(A)
        • Q(i);N_GUARD,P_PINS(J)::B(K)+P(G)
      • Refutation
        • P(f);P_SPINP(f),XP(E)
    • Try
      • Q(H);CHECK,N_PINP(f)
      • Vars
        • Q(i);P_PINS(J),XQ(H)::B(K)+P(G)
      • Refutation
        • B(j);XQ(H)
    • Try
      • Q(H);CHECK,N_PINP(f)
      • Vars
        • Q(i);P_PINS(J),P_SPINQ(i)::B(K)+P(G)
      • Refutation
        • B(j);XQ(H)
    • Try
      • P(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::B(K),XQ(i)
      • Refutation
        • Q(i);XB(K)
  • Actual
    • P(E);
    • Threat
      • R1(C)
    • Vars
      • Q(i);N_SPINP(f),OGATE,XQ(H)::B(K)+P(G),XQ(i)
      • R(b);N_GUARD,XR(C)::S(A)
      • R(b);SBLOCK::S(J)
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