MESON Chess Problem Database

Problem Display
PID: 86402 (2BKn3/2Q5/1N1nr1pb/4k1p1/r3P2B/4P2N/8/5R1b w - - 0 1)

Rudenko, Valentin Fedorovich

El Ajedrez Espanol, 1962

2BKn3/2Q5/1N1nr1pb/4k1p1/r3P2B/4P2N/8/5R1b

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qc5#
    • 1...Re7
      • 2.Qxe7#
    • 1...Bxe4
      • 2.Bg3#
  • Tries
    • 1.Sxg5?
      • threat
        • 2.Sd7#
        • 2.Bg3#
        • 2.Qc5#
      • 1...Rxe4
        • 2.Sf7#
        • 2.Qc5#
      • 1...Bxe4
        • 2.Sf7#
        • 2.Bg3#
      • 1...Sxc7
        • 2.Sd7#
        • 2.Bg3#
      • 1...Bf3
        • 2.Sd7#
      • 1...Rc4
        • 2.Sxc4#
        • 2.Sd7#
        • 2.Bg3#
      • 1...Rd4
        • 2.Sd7#
        • 2.Bg3#
      • 1...Ra5
        • 2.Sc4#
        • 2.Sd7#
        • 2.Bg3#
        • 2.Qc3#
      • 1...Rf6
        • 2.Sd7#
        • 2.Qc5#
      • 1...Re7
        • 2.Bg3#
        • 2.Qc5#
        • 2.Qxe7#
      • 1...Sf6
        • 2.Bg3#
      • 1...Bxg5+!
    • 1.Qc3+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Kxe4!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sd7#
      • 1...Kf6
        • 2.Sg4#
      • 1...Rxe4
        • 2.Sd3#
      • 1...Bxe4
        • 2.Sg4#
      • 1...Rf6
        • 2.Qc5#
      • 1...Re7
        • 2.Qxe7#
      • 1...Sf6
        • 2.Bg3#

This is a version of 138479

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(D)::QAR2(G)
    • R(f);OGATEB::QAR2(G),XR(f)
    • B(a);SBLOCK,XP(D)::B(E)
  • Tries
    • Try
      • S(C);XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::S(F)
        • S(i);::B(E)
      • Refutation
        • B(h);CHECK,XS(C)
    • Try
      • Q(G);CHECK,N_PINS(e)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(G),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
  • Actual
    • S(C);
    • Threat
      • S(F)
    • Vars
      • K(c);N_SPINS(e),P_SPINP(d),S_FLIGHT::R(A)+S(C),DCHECK
      • R(b);SBLOCK,XP(D)::S(C)
      • B(a);SBLOCK,XP(D)::S(C)
      • R(f);SBLOCK::QAR2(G)
      • R(f);OGATEB::QAR2(G),XR(f)
      • S(i);SBLOCK::B(E)
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