MESON Chess Problem Database

Problem Display
PID: 106122 (5K2/2pN4/n1pR4/2p1pB2/P1kq3Q/2Pp4/P2B3b/1R5b w - - 0 1)

Eerkes, Allard Pieter

Schakend Nederland, 1942

5K2/2pN4/n1pR4/2p1pB2/P1kq3Q/2Pp4/P2B3b/1R5b

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Be6#
    • 1...Qf4
      • 2.Sxe5#
    • 1...Qg4
      • 2.Bxd3#
    • 1...Qxh4
      • 2.Bxd3#
    • 1...Bg1
      • 2.Sxe5#
    • 1...cxd6
      • 2.Sb6#
  • Tries
    • 1.cxd4?
      • threat
        • 2.Rc1#
      • 1...cxd6
        • 2.Sb6#
      • 1...Sb4!
  • Keys
    • 1.Rc1!
      • threat
        • 2.cxd4#
      • 1...Qxh4
        • 2.Bxd3#
      • 1...cxd6
        • 2.Sb6#
      • 1...Qe4
        • 2.Be6#
      • 1...Qf4
        • 2.Sxe5#
      • 1...Qg4
        • 2.Bxd3#
      • 1...Sb4
        • 2.cxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(e);S_CUTB(a)::B(G)
    • Q(e);P_PINB(G),S_CUTB(b)::S(I),XP(g)
    • Q(e);::B(G),XP(c)
    • Q(e);N_SPINQ(e),XQ(F)::B(G),XP(c)
    • B(b);N_GUARD::S(I),XP(g)
    • P(j);N_GUARD,XR(H)::S(I)
  • Tries
    • Try
      • P(D);XQ(e)
      • Threat
        • R(A)
      • Vars
        • P(j);N_GUARD,XR(H)::S(I)
      • Refutation
        • S(h);
  • Actual
    • R(A);
    • Threat
      • R(A)+P(D),XQ(e)
    • Vars
      • Q(e);N_SPINQ(e),XQ(F)::B(G),XP(c)
      • P(j);N_GUARD,XR(H)::S(I)
      • Q(e);S_CUTB(a)::B(G)
      • Q(e);P_PINB(G),S_CUTB(b)::S(I),XP(g)
      • Q(e);::B(G),XP(c)
      • S(h);OGATE::R(A)+P(D),XS(h)
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