MESON Chess Problem Database

Problem Display
PID: 244368 (8/6K1/4pNNp/3pP1p1/3P2P1/Qb2pk2/P5R1/7B w - - 0 1)

Bruchner, Siegfried

Schweizerische Schachzeitung, 1992

8/6K1/4pNNp/3pP1p1/3P2P1/Qb2pk2/P5R1/7B

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qxb3#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Rg1#
        • 2.Qe2#
      • 1...e2
        • 2.Qc3#
        • 2.Qxe2#
        • 2.Qxb3#
      • 1...Bd1
        • 2.Rg1#
      • 1...Bc4
        • 2.Rg1#
      • 1...Bc2!
    • 1.Qa6?
      • threat
        • 2.Qf1#
        • 2.Qe2#
      • 1...e2
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Bd1
        • 2.Qf1#
      • 1...Bc4!
    • 1.axb3?
      • 1...e2
        • 2.b4#
      • 1...h5!
  • Keys
    • 1.Se4!
      • 1...Kxe4
        • 2.Rd2#
      • 1...Bxa2
        • 2.Sd2#
      • 1...dxe4
        • 2.Qf8#
      • 1...e2
        • 2.Rg3#
      • 1...Bd1
        • 2.Sd2#
      • 1...Bc2
        • 2.Sd2#
      • 1...Ba4
        • 2.Sd2#
      • 1...Bc4
        • 2.Sd2#
      • 1...h5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,P_SPINB(a)::QAR(D),XB(a)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::B(A)+R(C)
      • Refutation
        • B(a);
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR2(D)
      • Refutation
        • B(a);
    • Try
      • P(B);XB(a)
      • Vars
        • P(b);::QAR(D)+P(B)
      • Refutation
        • P(g);
  • Actual
    • S(H);
    • Vars
      • K(c);S_FLIGHT,XS(H)::B(A)+R(C)
      • B(a);P_SPINP(b),XP(B)::S(H)
      • P(d);SBLOCK,XS(H)::QAR(D)
      • P(b);P_SPINB(a),SBLOCK::B(A)+R(C),DCHECK
      • B(a);P_SPINP(b)::S(H)
      • P(g);N_GUARD::S(H),XP(e)
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