MESON Chess Problem Database

Problem Display
PID: 76613 (3N4/1p1n3R/8/1p1k1p2/1P1n4/P3p1Q1/8/BB3R1K w - - 0 1)

Atkinson, HL

Chess Amateur (The), 1911

3N4/1p1n3R/8/1p1k1p2/1P1n4/P3p1Q1/8/BB3R1K

#2

9 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qxd4#
      • 1...Sb3
        • 2.Rxd7#
      • 1...Sc2
        • 2.Ba2#
        • 2.Rxd7#
      • 1...Se2
        • 2.Ba2#
        • 2.Rxd7#
      • 1...Sf3
        • 2.Ba2#
        • 2.Rxd7#
      • 1...Sc6
        • 2.Ba2#
        • 2.Rxd7#
      • 1...Se6
        • 2.Ba2#
        • 2.Rxd7#
      • 1...Kc4!
    • 1.Qg8+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Kd6!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rxd4#
      • 1...Kc4
        • 2.Qg8#
      • 1...Ke5
        • 2.Rxf5#
      • 1...Kd6
        • 2.Rxd4#
      • 1...Sc2
        • 2.Rxd7#
      • 1...Se2
        • 2.Rxd7#
      • 1...Sb3
        • 2.Rxd7#
      • 1...Sf3
        • 2.Rxd7#
      • 1...Sc6
        • 2.Rxd7#
      • 1...Se6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XS(b)
      • Vars
        • S(b);::R(H),XS(g)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::QAR1(F)
        • S(b);N_GUARD,P_SPINS(b)::QAB1(F),XS(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • R1(C),XS(b)
    • Vars
      • K(d);P_SPINS(b),S_FLIGHT::QAB(F)
      • K(d);P-FLIGHT,P_SPINS(b)::QAB(F)+R(C),DCHECK,XP(e)
      • K(d);P-FLIGHT::QAB(F)+R(C),DCHECK,XS(b)
      • S(b);::R(H),XS(g)
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