MESON Chess Problem Database

Problem Display
PID: 64790 (BB3R2/2Q1p3/1p1n2p1/5n2/2p1r1p1/5kp1/6N1/5K2 w - - 0 1)

Koldijk, Albert Marinus

Loeks, 1986

BB3R2/2Q1p3/1p1n2p1/5n2/2p1r1p1/5kp1/6N1/5K2

#2

6 + 10

102 Probleemblad 2005
23 Die Schwalbe 2006
102 Probleemblad 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qxg3#
      • 2.Qf4#
    • 1...Sb7
      • 2.Qxg3#
    • 1...Sf7
      • 2.Qf4#
    • 1...Sc8
      • 2.Qxg3#
      • 2.Qf4#
    • 1...Se8
      • 2.Qxg3#
      • 2.Qf4#
    • 1...c3
      • 2.Qxc3#
  • Tries
    • 1.Bxe4+?
      • 1...Sxe4
        • 2.Qf4#
      • 1...Kxe4!
    • 1.Rxf5+?
      • 1...Sxf5
        • 2.Qf4#
      • 1...gxf5!
    • 1.Qxd6?
      • threat
        • 2.Qxg3#
        • 2.Qf4#
        • 2.Qd1#
      • 1...g5
        • 2.Rxf5#
        • 2.Qxg3#
        • 2.Qd1#
      • 1...e5
        • 2.Qd1#
      • 1...exd6!
    • 1.Qc5?
      • threat
        • 2.Qe3#
      • 1...Sb7
        • 2.Sh4#
      • 1...Sf7
        • 2.Se1#
      • 1...bxc5!
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Qe3#
      • 1...Sb7
        • 2.Sh4#
      • 1...Sf7
        • 2.Se1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(h);N_SPINR(d),OGATE::QAR1(C),XP(b)
    • S(h);N_SPINS(f),OGATE::QAR1(C)
    • P(c);OGATE::QAR(C),XP(c)
  • Tries
    • Try
      • B(D);CHECK,XR(d)
      • Vars
        • S(h);OGATE,XB(D)::QAR1(C)
      • Refutation
        • K(a);N_SPINS(f),S_FLIGHT,XB(D)
    • Try
      • R(F);CHECK,XS(f)
      • Vars
        • S(h);OGATE,XR(F)::QAR1(C)
      • Refutation
        • P(i);XR(F)
    • Try
      • Q(C);XS(h)
      • Threat
        • DUALS(3)
      • Vars
        • P(j);::QAB(C)
      • Refutation
        • P(j);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(h);N_SPINR(d)::S(B)
        • S(h);N_SPINS(f)::S(B)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);XP(g)
    • Threat
      • QAR1(C)
    • Vars
      • S(h);N_SPINR(d)::S(B)
      • S(h);N_SPINS(f)::S(B)
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