MESON Chess Problem Database

Problem Display
PID: 160175 (8/6N1/1Q6/4k1p1/8/8/3N2K1/8 w - - 0 1)

Rohr, Hugo

La Strategie, 1927

8/6N1/1Q6/4k1p1/8/8/3N2K1/8

#2

4 + 2

5454 Near Snap 2017
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qd4#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Kf6!
    • 1.Qd8?
      • 1...Kf4
        • 2.Qd4#
      • 1...g4!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Sh5#
        • 2.Qe4#
      • 1...Kd4!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd5
        • 2.Qe6#

Anticipated by 194216(1917), 149207(1924)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(C)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::QAR2(C)
      • K(a);P-FLIGHT::QAB1(C)
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