MESON Chess Problem Database

Problem Display
PID: 107292 (b7/3p4/1q5p/8/1pp3p1/6Rp/1Q1PPk1K/3B2R1 w - - 0 1)

Grudzinski, Henryk

Kutnohorsky Denik, 2005

b7/3p4/1q5p/8/1pp3p1/6Rp/1Q1PPk1K/3B2R1

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qa5
      • 2.Qd4#
    • 1...Qc7
      • 2.Qd4#
    • 1...Qd8
      • 2.Qd4#
    • 1...Qb5
      • 2.Qd4#
    • 1...Qa6
      • 2.Qd4#
    • 1...Qc6
      • 2.Qd4#
    • 1...Qg6
      • 2.Qd4#
    • 1...Qb7
      • 2.Qd4#
    • 1...Qb8
      • 2.Qd4#
  • Tries
    • 1.Qf6+?
      • 1...Bf3
        • 2.Qxb6#
      • 1...Qxf6!
  • Keys
    • 1.e4!
      • threat
        • 2.d3#
        • 2.d4#
      • 1...Bxe4
        • 2.d3#
      • 1...Qe3
        • 2.dxe3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qf6
        • 2.Qxf6#
        • 2.d4#
      • 1...c3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD::QAB(C),XQ(f)
    • Q(f);N_GUARD::QAB(C)
    • Q(f);N_GUARD,P_PINR(G)::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);P_SPINB(i)::QAB(C),XQ(f)
      • Refutation
        • Q(f);XQ(C)
  • Actual
    • P(E);
    • Threat
      • DUALS(2)
    • Vars
      • B(i);XP(E)::QAR(C)+P(D)
      • Q(f);OGATE::QAR(C)+P(D),XQ(f)
      • Q(f);N_GUARD::QAB(C),XQ(f)
      • P(d);OGATE::QAR(C)+P(D),XP(d)
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