MESON Chess Problem Database

Problem Display
PID: 268704 (K1R2b2/1B6/8/R1N3pb/p1k3r1/P2p4/1P1rPQ2/8 w - - 0 1)

Eerkes, Allard Pieter

Groeneveld, Cornelis

Probleemblad, 1986

K1R2b2/1B6/8/R1N3pb/p1k3r1/P2p4/1P1rPQ2/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.exd3#
  • Tries
    • 1.Sb3+?
      • 1...Bc5
        • 2.Sxd2#
      • 1...Kxb3!
    • 1.Se4+?
      • 1...Bc5
        • 2.Sxd2#
      • 1...Kb3!
    • 1.Qf6?
      • threat
        • 2.Qc3#
      • 1...Rxb2
        • 2.exd3#
      • 1...Rc2
        • 2.exd3#
      • 1...Rd4
        • 2.Qa6#
      • 1...Bg7!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Se6#
      • 1...Rxb2
        • 2.Qxd3#
      • 1...dxe2
        • 2.Qc3#
      • 1...Rd4
        • 2.Ba6#
      • 1...Re4
        • 2.Qxe4#
      • 1...Bf7
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::P(B),XP(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(h);P_SPINB(h)::S(F),XR(a)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • B(h);P_SPINB(h)::S(F),XR(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);N_GUARD,XP(A)::P(B),XP(b)
        • R(a);N_GUARD::P(B),XP(b)
        • R(e);SBLOCK::QAB(C)
      • Refutation
        • B(h);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);N_GUARD,P-FLIGHT,S_CUTB(h)::S(F)
      • R(a);N_GUARD,XP(A)::QAB1(C),XP(b)
      • P(b);OGATE,XP(B)::QAR1(C)
      • R(e);SBLOCK::B(G)
      • R(e);N_GUARD::QAR2(C),XR(e)
      • B(g);N_GUARD::QAR(C),XR(e)
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