MESON Chess Problem Database

Problem Display
PID: 63182 (2Q1R3/4rR1K/6p1/BN4P1/2pn1n2/3pkpN1/2P1BpP1/5b2 w - - 0 1)

Rudenko, Valentin Fedorovich

1st Prize, Shakhmaty, 1973

2Q1R3/4rR1K/6p1/BN4P1/2pn1n2/3pkpN1/2P1BpP1/5b2

#2

11 + 10

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rxe4#
    • 1...Re5
      • 2.Rxe5#
  • Tries
    • 1.Rfxe7+?
      • 1...Sde6
        • 2.Qc5#
      • 1...Sfe6!
    • 1.Rexe7+?
      • 1...Sde6
        • 2.Qc5#
      • 1...Sfe6!
    • 1.Qxc4?
      • threat
        • 2.Qxd4#
      • 1...Sxc2
        • 2.Qxf4#
      • 1...Sdxe2
        • 2.Sxf1#
      • 1...Sxb5
        • 2.Qxf4#
      • 1...Sfxe2
        • 2.Qxd3#
      • 1...Sfe6
        • 2.Qxd3#
      • 1...Sb3
        • 2.Qxf4#
      • 1...Sc6
        • 2.Qxf4#
      • 1...Sde6
        • 2.Qe4#
      • 1...Sf5!
    • 1.Qc5?
      • threat
        • 2.Qxd4#
      • 1...Sxe2
        • 2.Rexe7#
      • 1...Se6
        • 2.Qe5#
      • 1...c3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxf4#
      • 1...Sdxe2
        • 2.Qxf3#
      • 1...Sfxe2
        • 2.Sxf1#
      • 1...Sxg2
        • 2.Qxd4#
      • 1...Sfe6
        • 2.Qe4#
      • 1...Sf5
        • 2.Qxf3#
      • 1...Sde6
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qxd4#
      • 1...Sd5
        • 2.Qxd4#
      • 1...Sh5
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(j);N_PINR(H),OGATE::R1(K),XR(j)
    • R(j);N_PINR(H),OGATE::R(K),XR(j)
  • Tries
    • Try
      • R(H);CHECK,N_SPINR(H),XR(j)
      • Vars
        • S(g);P_SPINS(g),S_CUTS(h)::QAB(J)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • R(K);CHECK,N_SPINR(H),XR(j)
      • Vars
        • S(g);P_SPINS(g),S_CUTS(h)::QAB(J)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(J);XP(f)
      • Threat
        • QAB1(J),XS(g)
      • Vars
        • S(g);OGATE,XP(A)::QAB1(J),XS(h)
        • S(g);SBLOCK,XB(B)::S(D),XB(a)
        • S(g);OGATE,XS(F)::QAB1(J),XS(h)
        • S(h);N_GUARD,XB(B)::QAR1(J),XP(c)
        • S(h);N_GUARD,N_SPINR(j)::QAR1(J),XP(c)
        • S(g);OGATE::QAB1(J),XS(h)
        • S(g);N_SPINR(j),OGATE::QAR1(J)
      • Refutation
        • S(g);
    • Try
      • Q(J);P_PINS(g)
      • Threat
        • QAB1(J),XS(g)
      • Vars
        • S(h);N_GUARD,XB(B)::R(K),XR(j)
        • S(h);N_SPINR(j),S_CUTR(j)::QAR2(J)
      • Refutation
        • P(f);
  • Actual
    • Q(J);
    • Threat
      • QAB1(J),XS(h)
    • Vars
      • S(g);N_GUARD,XB(B)::QAR1(J),XP(e)
      • S(h);SBLOCK,XB(B)::S(D),XB(a)
      • S(h);OGATE,XP(C)::QAB1(J),XS(g)
      • S(h);N_SPINR(j),OGATE::QAR1(J)
      • S(g);N_GUARD::QAR1(J),XP(e)
      • S(g);N_GUARD,N_SPINR(j)::QAR1(J),XP(e)
      • S(h);OGATE::QAB1(J),XS(g)
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