MESON Chess Problem Database

Problem Display
PID: 11875 (B7/1NK2p2/1ppN3r/1P1kpP2/3PR3/1P1P2b1/b1r3Q1/4q3 w - - 0 1)

Hassberg, Eric Manfred

23rd Place, 01. WCCT, 1972-1975

B7/1NK2p2/1ppN3r/1P1kpP2/3PR3/1P1P2b1/b1r3Q1/4q3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Rc4
      • 2.dxc4#
    • 1...exd4
      • 2.Re2#
    • 1...cxb5+
      • 2.Sc5#
    • 1...c5
      • 2.Sa5#
      • 2.Sxc5#
      • 2.Sd8#
  • Tries
    • 1.Re2+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kxd4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sxb6#
      • 1...exd4+
        • 2.Re5#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Rxc4
        • 2.dxc4#
      • 1...cxb5
        • 2.Sd6#
      • 1...Qa5
        • 2.Se3#
      • 1...c5
        • 2.Sbd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,P_SPINQ(a),XR(E)::QAB1(A),XQ(a)
    • R(c);OGATE::P(C),XR(c)
    • P(f);N_GUARD,P_PINS(H),SBLOCK,XP(D)::QAB(A)+R(E)
    • P(h);CHECK,XP(F)::B(K)+S(I)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • P(f);P_PINS(H),P_SPINP(f)::QAB1(A),XP(f)
      • Refutation
        • K(e);P-FLIGHT,XP(D)
  • Actual
    • S(H);
    • Threat
      • S(H),XP(g)
    • Vars
      • P(f);CHECK,SBLOCK,XP(D)::QAB(A)+R(E),DCHECK
      • Q(a);OGATE,P_SPINQ(a),XR(E)::QAB1(A),XQ(a)
      • R(c);OGATE,XS(H)::P(C),XR(c)
      • P(h);P_PINS(H),XP(F)::B(K)+S(I)
      • Q(a);N_GUARD::S(H)
      • P(h);::B(K)+S(I)
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Developed and maintained by Brian Stephenson.
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