MESON Chess Problem Database

Problem Display
PID: 55399 (8/N5N1/3p4/K2p2P1/3kp3/1P1bR1P1/R7/6Q1 w - - 0 1)

Pitkanen, Jorma

5th Comm., Israel Ring Ty., 2001

8/N5N1/3p4/K2p2P1/3kp3/1P1bR1P1/R7/6Q1

#2

9 + 5

721 Variantim 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Se6#
    • 1...Ke5
      • 2.Sc6#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Sc6#
      • 1...Bb5!
    • 1.Rd2?
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Sc6#
      • 1...Kc3!
    • 1.Rxd3+?
      • 1...Ke5
        • 2.Sc6#
        • 2.Qd4#
      • 1...Kxd3!
    • 1.Qa1+?
      • 1...Kc5
        • 2.Se6#
      • 1...Kxe3!
    • 1.Qe1?
      • 1...Kc5
        • 2.Se6#
        • 2.Qb4#
      • 1...Ke5
        • 2.Sc6#
      • 1...Be2
        • 2.Qc3#
      • 1...Bb5
        • 2.Qc3#
      • 1...Bb1
        • 2.Qc3#
      • 1...Bf1
        • 2.Qc3#
      • 1...Bc2
        • 2.Qc3#
      • 1...Ba6
        • 2.Qc3#
      • 1...Bc4!
  • Keys
    • 1.Qd1!
      • 1...Kc3
        • 2.Sb5#
      • 1...Kxe3
        • 2.Sf5#
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(I)
    • K(b);P_SPINP(c),S_FLIGHT::S(H)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • S(H)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::S(H)
      • Refutation
        • B(a);
    • Try
      • R(B);P_PINB(a)
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::S(I)
        • K(b);N_SPINB(a),P_SPINP(c),S_FLIGHT::S(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK,XB(a)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(I)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::S(H)
        • B(a);::QAB1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);P_PINB(a)
    • Vars
      • K(b);S_FLIGHT::S(H)
      • K(b);N_SPINB(a),S_FLIGHT,XR(D)::S(I)
      • K(b);N_SPINB(a),S_FLIGHT::S(I)
      • K(b);N_SPINB(a),P_SPINP(c),S_FLIGHT::S(H)
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