MESON Chess Problem Database

Problem Display
PID: 234860 (3b4/8/Qn1R4/1P2n3/PBk5/K7/4P3/8 w - - 0 1)

Groeneveld, Cornelis

Springaren, 2001

3b4/8/Qn1R4/1P2n3/PBk5/K7/4P3/8

#2

7 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.exd3#
    • 1...Sc6
      • 2.bxc6#
    • 1...Sxa4
      • 2.b6#
    • 1...Sd7
      • 2.b6#
    • 1...Sa8
      • 2.b6#
    • 1...Sc8
      • 2.b6#
  • Tries
    • 1.Qxb6?
      • threat
        • 2.Rd4#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Sd3
        • 2.Rd4#
        • 2.Qd4#
        • 2.exd3#
      • 1...Sf3
        • 2.Qc5#
        • 2.Qc6#
      • 1...Sc6
        • 2.Qc5#
        • 2.Qxc6#
      • 1...Sd7
        • 2.Rd4#
        • 2.Qd4#
      • 1...Bxb6!
    • 1.Qa8?
      • threat
        • 2.Qe4#
      • 1...Sxa4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf3
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxa8!
    • 1.e3?
      • threat
        • 2.Rd4#
      • 1...Sd5
        • 2.b6#
      • 1...Sc6
        • 2.bxc6#
      • 1...Sf3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qe4#
      • 1...Sxa4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf3
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(b);OGATE::P(A),XS(b)
    • S(b);OGATE::QAB(F)+P(E),XS(b)
    • S(c);OGATE,XP(C)::QAB(F)+P(E)
    • S(c);OGATE::QAB(F)+P(E)
  • Tries
    • Try
      • Q(F);XS(c)
      • Threat
        • DUALS(3)
      • Refutation
        • B(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB1(F)
        • S(c);N_GUARD::QAB1(F),XS(c)
        • S(b);N_GUARD::QAR2(F)
        • S(b);N_GUARD::QAR2(F),XS(b)
      • Refutation
        • S(c);XQ(F)
    • Try
      • P(A);
      • Threat
        • R1(G)
      • Vars
        • S(c);OGATE::QAB(F)+P(E)
        • S(b);OGATE::QAB(F)+P(E),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(F);
    • Threat
      • QAR2(F)
    • Vars
      • S(c);N_GUARD,XP(C)::QAB1(F)
      • S(c);N_GUARD::QAB1(F),XS(c)
      • S(b);N_GUARD::QAR2(F)
      • S(b);N_GUARD::QAR2(F),XS(b)
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