MESON Chess Problem Database

Problem Display
PID: 86408 (8/1bn1P1p1/1r1p2Q1/1qpkN2K/1b3P2/2pp1P2/P7/2RR2B1 w - - 0 1)

Rudenko, Valentin Fedorovich

Magyar Sakkelet, 1973

8/1bn1P1p1/1r1p2Q1/1qpkN2K/1b3P2/2pp1P2/P7/2RR2B1

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Rxd3#
    • 1...Qc6
      • 2.Rxd3#
    • 1...Qd7
      • 2.Rxd3#
    • 1...Qe8
      • 2.Rxd3#
    • 1...Qa5
      • 2.Rxd3#
    • 1...Sa6
      • 2.Qf7#
    • 1...Se6
      • 2.Qe4#
    • 1...Sa8
      • 2.Qf7#
    • 1...Se8
      • 2.Qf7#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qxd3#
      • 1...Kc6
        • 2.Qxd6#
      • 1...Qc4!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Se5#
      • 1...Qc4
        • 2.Sxb4#
      • 1...Qe8
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(d);N_GUARD::R(B),XP(b)
    • Q(d);N_GUARD,P_PINQ(I)::R(B),XP(b)
    • S(j);N_GUARD::QAB(I)
    • S(j);SBLOCK::QAB1(I)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(I)
      • Vars
        • K(f);N_SPINP(b),P_SPINP(a),S_FLIGHT::QAB1(I),XP(b)
        • K(f);N_SPINP(b),P_SPINP(h),S_FLIGHT::QAR1(I),XP(h)
      • Refutation
        • Q(d);
  • Actual
    • S(G);XP(b)
    • Threat
      • QAB1(I)
    • Vars
      • K(f);P_SPINP(a),S_FLIGHT::S(G)
      • K(f);P_SPINP(h),S_FLIGHT::S(G)
      • Q(d);SBLOCK::R(B)+S(G),DCHECK,XB(c)
      • Q(d);N_GUARD,P_PINQ(I)::R(B)+S(G)
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