MESON Chess Problem Database

Problem Display
PID: 134988 (1n2K3/R1B1b3/4N3/1kp5/1p6/1Q3R2/8/8 w - - 0 1)

Udartsev, Valentin Filipovich

6th HM., Die Schwalbe 162. TT, 1979

1n2K3/R1B1b3/4N3/1kp5/1p6/1Q3R2/8/8

#2

6 + 5

102 Probleemblad 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qa4#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qa4#
      • 1...Kc6
        • 2.Sd4#
      • 1...Sa6!
    • 1.Rb7+?
      • 1...Kc6
        • 2.Rb6#
      • 1...Ka6!
    • 1.Qc4+?
      • 1...Kc6
        • 2.Sd4#
      • 1...Kxc4!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sd4#
      • 1...Kc6
        • 2.Qa4#
      • 1...Bf6
        • 2.Rxc5#
      • 1...Sc6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);N_SPINP(a),P_SPINP(c),S_FLIGHT::S(C)
      • Refutation
        • S(e);
    • Try
      • R(D);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • R(B);
    • Threat
      • S(C)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::QAB(A)
      • B(d);N_GUARD::R1(B),XP(c)
      • S(e);SBLOCK::QAB(A)
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