MESON Chess Problem Database

Problem Display
PID: 222568 (4N3/8/4b3/1RN1k2n/1Q1nP3/8/5K2/6R1 w - - 0 1)

Ernst, Heinrich

New Orleans Times-Democrat, 1883

4N3/8/4b3/1RN1k2n/1Q1nP3/8/5K2/6R1

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Sd3#
    • 1...Se2
      • 2.Sd3#
    • 1...Sb3
      • 2.Sd3#
    • 1...Sf3
      • 2.Sd3#
    • 1...Sxb5
      • 2.Sd3#
    • 1...Sf5
      • 2.Sd3#
    • 1...Sc6
      • 2.Sd3#
  • Tries
    • 1.Rg5+?
      • 1...Kf4
        • 2.Qd2#
      • 1...Sf5
        • 2.Sd3#
      • 1...Bf5!
    • 1.Qxd4+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Sxe6#
        • 2.Qd6#
      • 1...Kxd4!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Qb8#
      • 1...Kf4
        • 2.Qb8#
      • 1...Sc2
        • 2.Sd3#
      • 1...Se2
        • 2.Sd3#
      • 1...Sb3
        • 2.Sd3#
      • 1...Sf3
        • 2.Sd3#
      • 1...Sb5
        • 2.Sd3#
      • 1...Sf5
        • 2.Sd3#
      • 1...Sc6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);::R(E)+S(F),DCHECK
    • S(a);XR(E)::S(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(C)
        • S(a);P_SPINS(a)::R(E)+S(F),DCHECK
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(C);CHECK,XS(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • R(E);
    • Threat
      • QAB(C)
    • Vars
      • K(b);S_FLIGHT::QAB(C)
      • S(a);::R(E)+S(F),DCHECK
      • S(a);::S(F)
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