MESON Chess Problem Database

Problem Display
PID: 206770 (4R3/3B4/6n1/3k1nK1/8/2Q5/8/8 w - - 0 1)

Springer, D

Source?, 1870

4R3/3B4/6n1/3k1nK1/8/2Q5/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc6#
    • 1...Sd6
      • 2.Bc6#
  • Tries
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxc4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qc6#
      • 1...Kxe4
        • 2.Bc6#
      • 1...Kd6
        • 2.Qc6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sfe7
        • 2.Qd4#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sge7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(A)
    • S(b);SBLOCK::B(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • R(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT,XR(D)::B(C)
      • K(a);P-FLIGHT::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • S(b);N_GUARD::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • S(c);N_GUARD::QAR1(A)
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