MESON Chess Problem Database

Problem Display
PID: 244436 (1b3K2/6N1/R2n1k2/4rNpP/2n5/1Q3p2/2pp1r2/B2b4 w - - 0 1)

Eerkes, Allard Pieter

Skakbladet, 1935

1b3K2/6N1/R2n1k2/4rNpP/2n5/1Q3p2/2pp1r2/B2b4

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qf7#
    • 1...Sa3
      • 2.Qe6#
      • 2.Qf7#
    • 1...Se3
      • 2.Qe6#
      • 2.Qf7#
    • 1...Sa5
      • 2.Qe6#
      • 2.Qf7#
    • 1...Sb6
      • 2.Qe6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sg4#
        • 2.Sd5#
      • 1...Sxe3
        • 2.Qe6#
        • 2.Qf7#
      • 1...Rg2
        • 2.Sd5#
      • 1...Sb2
        • 2.Sg4#
        • 2.Qf7#
      • 1...Sb6
        • 2.Sg4#
        • 2.Qe6#
      • 1...g4!
    • 1.Sxd6?
      • threat
        • 2.Se4#
        • 2.Sde8#
      • 1...Sxd6
        • 2.Qe6#
        • 2.Qf7#
      • 1...g4
        • 2.Se4#
      • 1...Bxd6+!
    • 1.Sh6?
      • threat
        • 2.Sg4#
        • 2.Sg8#
      • 1...Rg2
        • 2.Sg8#
      • 1...Se3
        • 2.Sg8#
        • 2.Se8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...g4!
    • 1.Se7?
      • threat
        • 2.Sd5#
        • 2.Sg8#
      • 1...Sb2
        • 2.Sg8#
        • 2.Se8#
        • 2.Qf7#
      • 1...Se3
        • 2.Sg8#
        • 2.Se8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sb6
        • 2.Sg8#
        • 2.Qe6#
      • 1...g4!
    • 1.Bxe5+?
      • 1...Sxe5
        • 2.Qe6#
      • 1...Kxe5!
    • 1.Rxd6+?
      • 1...Sxd6
        • 2.Qe6#
      • 1...Bxd6+!
    • 1.Qb7?
      • threat
        • 2.Qe7#
        • 2.Qf7#
      • 1...g4
        • 2.Qe7#
      • 1...Sb2
        • 2.Qf7#
      • 1...Sb6
        • 2.Qe7#
      • 1...Bc7!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Se4#
      • 1...Re2
        • 2.Qxf3#
      • 1...Sb2
        • 2.Qf7#
      • 1...Sb6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(f);N_SPINR(g),OGATE::QAR1(B)
    • S(f);N_SPINS(i),OGATE::QAR1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::S(C)
      • Refutation
        • P(h);
    • Try
      • S(C);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::R(E)+S(C),DCHECK
      • Refutation
        • B(k);CHECK,P_SPINB(k),XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::S(C)
      • Refutation
        • P(h);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(h);
    • Try
      • B(A);CHECK,XR(g)
      • Vars
        • S(f);OGATE,XB(A)::QAR1(B)
      • Refutation
        • K(j);N_SPINS(i),S_FLIGHT,XB(A)
    • Try
      • R(E);CHECK,XS(i)
      • Vars
        • S(f);OGATE,XR(E)::QAR1(B)
      • Refutation
        • B(k);CHECK,XR(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::QAB1(B)
        • S(f);N_SPINR(g)::QAR1(B)
        • S(f);N_SPINS(i)::QAB1(B)
      • Refutation
        • B(k);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(d);N_GUARD,S_CUTB(a)::QAR(B),XP(e)
      • S(f);N_SPINR(g),OGATE::QAR1(B)
      • S(f);N_SPINS(i),OGATE::QAR1(B)
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