MESON Chess Problem Database

Problem Display
PID: 10893 (5N1b/7R/2r1PNp1/R1q2k2/2p4P/3b1KB1/2B5/Q7 w - - 0 1)

Chlubna, Friedrich

2nd Comm., Schweizerische Arbeiter Schachzeitung, 1969

5N1b/7R/2r1PNp1/R1q2k2/2p4P/3b1KB1/2B5/Q7

#2

10 + 7

4654 64 + 100 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Ra6
      • 2.Rxc5#
    • 1...Rb6
      • 2.Rxc5#
    • 1...Be4+
      • 2.Bxe4#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Qf1#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Be4+
        • 2.Bxe4#
      • 1...Bxf6!
    • 1.Rh5+?
      • 1...g5
        • 2.Rxg5#
      • 1...gxh5!
    • 1.Qd4?
      • threat
        • 2.Qf4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Be4+
        • 2.Bxe4#
      • 1...g5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Kg2#
      • 1...Qd5+
        • 2.Ke3#
      • 1...Be4+
        • 2.Ke2#
      • 1...Kxf6
        • 2.Rf7#
      • 1...Bxf6
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);CHECK,OGATE::R(F),XQ(c)
    • Q(c);N_GUARD::QAR1(A),XQ(c)
    • R(e);N_GUARD::R(F),XQ(c)
    • B(a);CHECK,OGATE::B(B),XB(a)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • Q(c);CHECK,OGATE::R(F),XQ(c)
        • B(a);CHECK,OGATE::B(B),XB(a)
      • Refutation
        • B(g);XS(H)
    • Try
      • R(I);CHECK
      • Vars
        • P(f);P_SPINP(f)::R1(I),XP(f)
      • Refutation
        • P(f);XR(I)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);CHECK,OGATE::R(F),XQ(c)
        • B(a);CHECK,OGATE::B(B),XB(a)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+K(C)
    • Vars
      • Q(c);CHECK::QAR(A)+K(C)
      • B(a);CHECK::QAR(A)+K(C)
      • K(d);N_SPINB(a),N_SPINQ(c),OGATEB,P-FLIGHT,XS(H)::R1(I)
      • B(g);SBLOCK,XS(H)::QAB(A)
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