MESON Chess Problem Database

Problem Display
PID: 59819 (3R4/1n4Kn/1N1Pp1B1/4k1PR/3p4/3Pq1P1/2P5/4Q3 w - - 0 1)

Kovacs, Norbert

2nd HM., Brisbane Courier, 1923-1924

3R4/1n4Kn/1N1Pp1B1/4k1PR/3p4/3Pq1P1/2P5/4Q3

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qxe2#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Sa5
      • 2.Qxa5#
    • 1...Sxg5
      • 2.Rxg5#
    • 1...Sf6
      • 2.gxf6#
  • Tries
    • 1.Qa5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxa5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Sc4#
      • 1...Qxg5+
        • 2.Bg6#
      • 1...Qxd3
        • 2.Bxd3#
      • 1...Qxg3
        • 2.Qxg3#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Sxd6
        • 2.Sd7#
      • 1...Sa5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATEB::QAR(A),XQ(a)
    • Q(a);OGATE::QAR1(A),XQ(a)
    • S(e);N_GUARD::QAR(A),XS(e)
    • S(f);OGATE,P_SPINS(f),XP(E)::R(F),XS(f)
    • S(f);OGATE::R(F)+P(E),XS(f)
  • Tries
    • Try
      • Q(A);CHECK,N_PINQ(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(A),XS(e)
      • Refutation
        • S(e);XQ(A)
  • Actual
    • B(I);N_PINQ(a)
    • Threat
      • S(G)
    • Vars
      • Q(a);CHECK,OGATEB,P_SPINQ(a),XP(E)::QAR(A)+B(I)
      • Q(a);OGATE,XP(C)::QAR(A)+B(I),XQ(a)
      • Q(a);OGATE,P_PINP(E),XP(D)::QAB(A),XQ(a)
      • Q(a);OGATE,P_SPINQ(a),XB(I)::QAR1(A),XQ(a)
      • S(e);SBLOCK,XP(H)::S(G)
      • S(e);N_GUARD::QAR(A),XS(e)
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Developed and maintained by Brian Stephenson.
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