MESON Chess Problem Database

Problem Display
PID: 99726 (4b3/p1p5/1r6/Nn3R2/nk1pQ3/2p5/8/RN2BK2 w - - 0 1)

Haring, Jacobus

Magyar Sakkelet, 1976

4b3/p1p5/1r6/Nn3R2/nk1pQ3/2p5/8/RN2BK2

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bxc3+?
      • 1...Sbxc3
        • 2.Qxd4#
      • 1...Saxc3!
    • 1.Qc2?
      • threat
        • 2.Rxa4#
        • 2.Qxa4#
      • 1...Kxa5
        • 2.Rxa4#
        • 2.Qxa4#
      • 1...Sb2
        • 2.Qb3#
        • 2.Qxb2#
      • 1...Sa3
        • 2.Qb3#
      • 1...Sd6
        • 2.Qb3#
      • 1...Sc5!
    • 1.Qxd4+?
      • 1...Kxa5
        • 2.Rxa4#
        • 2.Qxa4#
      • 1...Sxd4!
  • Keys
    • 1.Sxc3!
      • threat
        • 2.Rxa4#
      • 1...Kxa5
        • 2.Rxa4#
      • 1...Saxc3
        • 2.Qb1#
      • 1...Sbxc3
        • 2.Qxd4#
      • 1...Sb2
        • 2.Sxb5#
      • 1...Sc5
        • 2.Sd5#
      • 1...Sa3
        • 2.Sa2#
      • 1...Sd6
        • 2.Sxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK,P_PINP(d),XP(a)
      • Vars
        • S(e);XB(C)::QAR2(E),XP(d)
      • Refutation
        • S(b);XB(C)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAR1(E)
      • Refutation
        • S(b);
    • Try
      • Q(E);CHECK,XP(d)
      • Refutation
        • S(e);XQ(E)
  • Actual
    • S(B);P_PINP(d),XP(a)
    • Threat
      • R1(A),XS(b)
    • Vars
      • K(c);N_SPINP(d),P_SPINS(b),S_FLIGHT,XS(F)::R1(A),XS(b)
      • S(b);N_GUARD,P_SPINS(b),XS(B)::QAR(E)
      • S(e);N_GUARD,P_SPINS(e),XS(B)::QAR2(E),XP(d)
      • S(b);N_GUARD::B(C)+S(B),XS(e)
      • S(b);SBLOCK::B(C)+S(B),DCHECK
      • S(e);SBLOCK::B(C)+S(B),DCHECK
      • S(e);N_GUARD::B(C)+S(B),XS(b)
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