MESON Chess Problem Database

Problem Display
PID: 122392 (7Q/b2Kp3/4N3/1kp1Rp2/2N2n1R/2P4B/P7/B7 w - - 0 1)

Sahlberg, Olof Wilhelm Robert

La Revue des Jeux, des Arts et du Sport, 1878

7Q/b2Kp3/4N3/1kp1Rp2/2N2n1R/2P4B/P7/B7

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Bf1#
  • Tries
    • 1.Sc7+?
      • 1...Kxc4
        • 2.Bf1#
      • 1...Ka4!
    • 1.Rxc5+?
      • 1...Ka4
        • 2.Ra5#
      • 1...Ka6
        • 2.Qc8#
      • 1...Bxc5!
  • Keys
    • 1.Qa8!
      • 1...Ka4
        • 2.Qc6#
      • 1...Kxc4
        • 2.Bf1#
      • 1...Ka6
        • 2.Sc7#
      • 1...Sxh3
        • 2.Qc6#
      • 1...Sxe6
        • 2.Qc6#
      • 1...Bb6
        • 2.Sa3#
      • 1...Bb8
        • 2.Rxc5#
      • 1...Se2
        • 2.Qc6#
      • 1...Sg2
        • 2.Qc6#
      • 1...Sd3
        • 2.Qc6#
      • 1...Sd5
        • 2.Qc6#
      • 1...Sh5
        • 2.Qc6#
      • 1...Sg6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),OGATEB,P_SPINS(a),S_FLIGHT,XS(E)::B(D)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(b);N_SPINP(c),P_SPINS(a),S_FLIGHT,XS(E)::B(D)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • R(G);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::R1(G)
        • K(b);S_FLIGHT::QAB(J)
      • Refutation
        • B(e);XR(G)
  • Actual
    • Q(J);
    • Vars
      • K(b);N_SPINP(c),P_SPINB(e),S_FLIGHT::QAB(J)
      • K(b);N_SPINP(c),OGATEB,P_SPINS(a),S_FLIGHT,XS(E)::B(D)
      • K(b);N_SPINP(c),P_SPINB(e),S_FLIGHT::S(H)
      • S(a);XB(D)::QAB1(J)
      • S(a);XS(H)::QAB1(J)
      • B(e);SBLOCK::S(E)
      • B(e);N_GUARD::R1(G),XP(c)
      • S(a);::QAB1(J)
      • S(a);N_SPINP(c)::QAB1(J)
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