MESON Chess Problem Database

Problem Display
PID: 244478 (5q2/2R2P1B/p1Nn2N1/3p4/pp1P4/1Pk2b2/4pB1b/1Q2K3 w - - 0 1)

Eerkes, Allard Pieter

Schakend Nederland, 1975

5q2/2R2P1B/p1Nn2N1/3p4/pp1P4/1Pk2b2/4pB1b/1Q2K3

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sxb4+?
      • 1...Sc4
        • 2.Sa2#
      • 1...Kxb4!
    • 1.Sge7?
      • threat
        • 2.Qc2#
      • 1...axb3
        • 2.Qc1#
      • 1...Se4
        • 2.Sxd5#
      • 1...Sf5
        • 2.Se5#
      • 1...Be4!
    • 1.Qa1+?
      • 1...Kxb3
        • 2.Sa5#
      • 1...Kd3
        • 2.Sf4#
        • 2.Sge5#
      • 1...Kc2!
    • 1.Qc1+?
      • 1...Kd3
        • 2.Sf4#
        • 2.Sge5#
      • 1...Kxb3!
    • 1.Qb2+?
      • 1...Kd3
        • 2.Sf4#
        • 2.Sge5#
      • 1...Kxb2!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qc2#
      • 1...axb3
        • 2.Qc1#
      • 1...Be4
        • 2.Sxe2#
      • 1...Se4
        • 2.Sxd5#
      • 1...Sf5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK,XP(f)
      • Vars
        • S(i);P_SPINS(i)::S(F)
      • Refutation
        • K(c);S_FLIGHT,XS(F)
    • Try
      • S(G);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);SBLOCK,XP(D)::QAR2(A)
        • S(i);S_CUTB(d)::S(G),XP(g)
        • S(i);N_GUARD::R(H)+S(F)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(D)::S(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • S(G);
    • Threat
      • QAR1(A)
    • Vars
      • P(e);SBLOCK,XP(D)::QAR2(A)
      • B(d);N_GUARD::S(G),XP(a)
      • S(i);S_CUTB(d)::S(G),XP(g)
      • S(i);N_GUARD::R(H)+S(F)
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