MESON Chess Problem Database

Problem Display
PID: 59417 (6R1/8/p3R3/4P3/2NPk3/4P3/8/QK2BN2 w - - 0 1)

Erokhin, Vladimir Alekseevich

2nd Place, Match: Israel - St. Petersburg, 2000

6R1/8/p3R3/4P3/2NPk3/4P3/8/QK2BN2

#2

10 + 2

23 Die Schwalbe 2005
6166 FIDE Album (1998-2000) 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Sfd2+?
      • 1...Kd5
        • 2.Rd6#
      • 1...Kf5
        • 2.Rf6#
      • 1...Kd3!
    • 1.Scd2+?
      • 1...Kd5
        • 2.Rd6#
        • 2.Qa2#
      • 1...Kf5
        • 2.Rf6#
      • 1...Kd3!
    • 1.Qa2?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd5
        • 2.Scd2#
      • 1...Kf5
        • 2.Sd6#
      • 1...a5!
  • Keys
    • 1.Qxa6!
      • 1...Kd3
        • 2.Sd6#
      • 1...Kf3
        • 2.Scd2#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(I)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(I)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)+S(F)
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • P(b);
  • Actual
    • Q(A);XP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(A)+S(F)
      • K(a);S_FLIGHT::S(F)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::S(D)
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