MESON Chess Problem Database

Problem Display
PID: 240597 (2b5/2P1k1Kp/7R/1B2NP2/p4pP1/q7/2p5/6Q1 w - - 0 1)

Groeneveld, Cornelis

Thema Danicum, 1995

2b5/2P1k1Kp/7R/1B2NP2/p4pP1/q7/2p5/6Q1

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qc5#
    • 1...Qb2
      • 2.Qc5#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qa1
      • 2.Qc5#
    • 1...Qa2
      • 2.Qc5#
    • 1...Qb3
      • 2.Qc5#
    • 1...Qf3
      • 2.Qc5#
    • 1...Qg3
      • 2.Qc5#
    • 1...Qh3
      • 2.Qc5#
    • 1...Ba6
      • 2.Re6#
    • 1...Be6
      • 2.Rxe6#
    • 1...Bb7
      • 2.Re6#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qd8#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qd3!
    • 1.Qb6?
      • threat
        • 2.Qf6#
        • 2.f6#
      • 1...Bxf5
        • 2.Qf6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Be6
        • 2.Rxe6#
        • 2.Qxe6#
        • 2.f6#
      • 1...Bd7!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qh4#
      • 1...Be6
        • 2.Rxe6#
      • 1...Bd7
        • 2.Sc6#
      • 1...Qd6
        • 2.Sg6#
      • 1...Qg3
        • 2.Qb4#
      • 1...Qh3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAB(A)
    • Q(b);N_GUARD,P_PINS(D)::QAB(A)
    • Q(b);N_GUARD::QAB(A),XQ(b)
    • Q(b);N_GUARD,P_PINP(B)::QAB(A)
    • B(g);N_GUARD::R1(F)
    • B(g);N_GUARD::R1(F),XB(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(g);N_GUARD::QAR1(A),XB(g)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XP(E)::QAB1(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
      • Refutation
        • B(g);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(g);N_GUARD::R1(F),XB(g)
      • B(g);SBLOCK::QAR(A)+S(D),DCHECK
      • Q(b);SBLOCK::QAR(A)+S(D),DCHECK
      • Q(b);N_GUARD,P_PINP(B)::QAB(A)
      • Q(b);N_GUARD::QAB(A)
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