MESON Chess Problem Database

Problem Display
PID: 63535 (1Q6/4p1q1/6p1/1Pn3NR/1BPkBp2/6n1/K1RPp3/2N4b w - - 0 1)

Rudenko, Valentin Fedorovich

1st Prize, Krasnoe Znamya, 1974

1Q6/4p1q1/6p1/1Pn3NR/1BPkBp2/6n1/K1RPp3/2N4b

#2

11 + 9

3771 FIDE Album (1974-1976) 1980
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Sxe2#
    • 1...Sf5
      • 2.Sxe2#
    • 1...Sxh5
      • 2.Sxe2#
    • 1...Sb3
      • 2.Sxb3#
    • 1...Sd3
      • 2.Sb3#
    • 1...Sa4
      • 2.Sb3#
    • 1...Sxe4
      • 2.Se6#
    • 1...Sa6
      • 2.Sb3#
    • 1...Se6
      • 2.Sb3#
    • 1...Sb7
      • 2.Sb3#
    • 1...Sd7
      • 2.Sb3#
    • 1...e5
      • 2.Qd6#
    • 1...e6
      • 2.Qd6#
  • Tries
    • 1.Se6+?
      • 1...Kxe4
        • 2.Qxf4#
      • 1...Sxe6!
    • 1.Ba3?
      • threat
        • 2.Bb2#
      • 1...Scxe4
        • 2.Se6#
      • 1...Sb3
        • 2.Sxb3#
      • 1...Sd3
        • 2.Sb3#
      • 1...Sa4
        • 2.Sb3#
      • 1...Sa6
        • 2.Sb3#
      • 1...Se6
        • 2.Sb3#
      • 1...Sb7
        • 2.Sb3#
      • 1...Sd7
        • 2.Sb3#
      • 1...Sgxe4!
    • 1.Bd3?
      • threat
        • 2.Bc3#
      • 1...Sxd3
        • 2.Sb3#
      • 1...Sb3
        • 2.Se6#
      • 1...Sa4
        • 2.Se6#
      • 1...Sce4
        • 2.Se6#
      • 1...Sa6
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sb7
        • 2.Se6#
      • 1...Sd7
        • 2.Se6#
      • 1...Sge4!
    • 1.Qa7?
      • threat
        • 2.Qxc5#
      • 1...Sxe4
        • 2.Se6#
      • 1...Qe5
        • 2.Sb3#
      • 1...Ke5!
    • 1.Qd8+?
      • 1...Ke5
        • 2.Bc3#
      • 1...Sd7!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qxc5#
      • 1...Ke5
        • 2.Bc3#
      • 1...Sxe4
        • 2.Se6#
      • 1...Qe5
        • 2.Sb3#

This anticipates 215978(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • S(c);N_GUARD::S(A),XP(b)
    • S(c);N_GUARD,XR(J)::S(A),XP(b)
    • S(f);N_GUARD::S(A),XS(f)
    • S(f);N_GUARD::S(A)
    • S(f);N_GUARD,SBLOCK,XB(G)::S(I)
    • P(h);N_GUARD::QAR2(K)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(d);P-FLIGHT,XB(G)::QAR1(K),XP(e)
      • Refutation
        • S(f);XS(I)
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • S(f);N_GUARD,SBLOCK,XB(G)::S(I)
        • S(f);N_GUARD::S(A),XS(f)
        • S(f);N_GUARD::S(A)
      • Refutation
        • S(c);XB(G)
    • Try
      • B(G);
      • Threat
        • B(E)
      • Vars
        • S(f);N_GUARD,SBLOCK,XB(G)::S(A)
        • S(f);N_GUARD::S(I)
        • S(f);N_GUARD::S(I),XS(f)
      • Refutation
        • S(c);
    • Try
      • Q(K);P_PINS(f)
      • Threat
        • QAB1(K),XS(f)
      • Vars
        • S(c);SBLOCK,XB(G)::S(I)
        • Q(i);SBLOCK::S(A)
      • Refutation
        • K(d);N_SPINS(f),S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • K(d);S_FLIGHT::B(E)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(K);P_PINS(f)
    • Threat
      • QAB1(K),XS(f)
    • Vars
      • K(d);N_SPINS(f),S_FLIGHT::B(E)
      • S(c);SBLOCK,XB(G)::S(I)
      • Q(i);SBLOCK::S(A)
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