MESON Chess Problem Database

Problem Display
PID: 158658 (K7/Q7/8/5p2/4B3/2NP1r2/5B1R/1Nq2k2 w - - 0 1)

Schuld, Henk L

British Chess Magazine 13. Ty., 1906-1907

K7/Q7/8/5p2/4B3/2NP1r2/5B1R/1Nq2k2

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qa3
      • 2.Sd2#
    • 1...Rxf2
      • 2.Rh1#
      • 2.Qxf2#
    • 1...Rxd3
      • 2.Bg2#
      • 2.Bxd3#
      • 2.Rh1#
    • 1...Rh3
      • 2.Bg2#
    • 1...Rf4
      • 2.Bg2#
      • 2.Rh1#
  • Tries
    • 1.Bxf3?
      • threat
        • 2.Be2#
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qxc3
        • 2.Rh1#
      • 1...Qb2
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qg5
        • 2.Be2#
      • 1...Qh6
        • 2.Be2#
        • 2.Bg2#
      • 1...Qd1
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qe1
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qc2
        • 2.Bg2#
        • 2.Rh1#
      • 1...Qe3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sd2#
      • 1...Qa3+
        • 2.Sxa3#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Rxf2
        • 2.Rh1#
      • 1...Rxd3
        • 2.Bxd3#
      • 1...Qd2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD,P_PINQ(G)::S(A)
    • R(c);OGATE::B(F)
  • Tries
    • Try
      • B(F);XR(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);XS(D)::R(C)
        • Q(a);::B(F)
      • Refutation
        • Q(a);
  • Actual
    • Q(G);
    • Threat
      • S(A)
    • Vars
      • Q(a);CHECK::QAR(G)+S(A),XQ(a)
      • Q(a);OGATE,P_SPINQ(a),XS(A)::QAR(G),XQ(a)
      • Q(a);XS(D)::QAR(G)+S(A),XQ(a)
      • R(c);SBLOCK,XB(B)::R(C)
      • R(c);OGATE,XP(E)::B(F),XR(c)
      • Q(a);::QAR(G)+S(A),DCHECK,XQ(a)
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