MESON Chess Problem Database

Problem Display
PID: 87582 (rB3R2/1p1K3p/1NpNp3/1p2k2p/1R3n2/3q3n/5Q2/bB5b w - - 0 1)

Konikowski, Jerzy

Problemista, 1965

rB3R2/1p1K3p/1NpNp3/1p2k2p/1R3n2/3q3n/5Q2/bB5b

#2

8 + 13

788 US Problem Bulletin 1965
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sdc4#
    • 1...Qe2
      • 2.Sdc4#
    • 1...Qc4
      • 2.Sdxc4#
    • 1...Qe4
      • 2.Sdc4#
    • 1...Qf5
      • 2.Sdc4#
    • 1...Qg6
      • 2.Sdc4#
    • 1...Qa3
      • 2.Sdc4#
    • 1...Qb3
      • 2.Sdc4#
    • 1...Qc3
      • 2.Sdc4#
    • 1...Qf3
      • 2.Sdc4#
    • 1...Qg3
      • 2.Sdc4#
    • 1...Qxd6+
      • 2.Bxd6#
    • 1...Sg1
      • 2.Qxf4#
    • 1...Sg5
      • 2.Qxf4#
    • 1...Se2
      • 2.Qf6#
    • 1...Sg2
      • 2.Qf6#
    • 1...Sd5
      • 2.Sf7#
    • 1...Sg6
      • 2.Qf6#
  • Tries
    • 1.Re4+?
      • 1...Qxe4
        • 2.Sdc4#
      • 1...Bxe4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf6#
      • 1...Qxd6+
        • 2.Bxd6#
      • 1...Qf5
        • 2.Sf7#
      • 1...Qg6
        • 2.Sf7#
      • 1...Sg5
        • 2.Qxf4#
      • 1...Sd5
        • 2.Sdc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 13
  • Sets
    • Q(c);N_PINS(E)::B(G)+S(E),DCHECK
    • Q(c);N_PINS(E)::B(G)+S(E),DCHECK,XQ(c)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
    • S(d);N_GUARD::QAB1(B),XS(e)
    • S(e);OGATE::QAB1(B)
    • S(e);N_PINS(E)::B(G)+S(E),DCHECK
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • Q(c);N_PINS(E),XR(C)::B(G)+S(E),DCHECK
      • Refutation
        • B(b);XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::B(G),XQ(c)
      • Q(c);N_PINS(E)::B(G)+S(E),DCHECK
      • S(d);N_GUARD::QAB1(B),XS(e)
      • S(e);N_PINS(E)::B(G)+S(E),DCHECK
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