MESON Chess Problem Database

Problem Display
PID: 245265 (4r3/nR1p4/5N2/1nkPp3/2Np3R/2p2B2/5K1B/1Q6 w - - 0 1)

Erokhin, Vladimir Alekseevich

64 Shakhmatnoe obozrenie, 1972

4r3/nR1p4/5N2/1nkPp3/2Np3R/2p2B2/5K1B/1Q6

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qb4#
    • 1...Sd6
      • 2.Qb4#
    • 1...Sc7
      • 2.Qb4#
    • 1...Sc6
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qxb5#
    • 1...d3
      • 2.Sxd7#
  • Tries
    • 1.Se3?
      • threat
        • 2.Se4#
      • 1...Kd6
        • 2.Qb4#
      • 1...Sd6
        • 2.Sxd7#
        • 2.Qb4#
        • 2.Qb6#
      • 1...d3
        • 2.Qb4#
      • 1...e4
        • 2.Sxd7#
      • 1...dxe3+!
    • 1.Rxb5+?
      • 1...Kxc4
        • 2.Be2#
        • 2.Qf1#
      • 1...Sxb5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Se4#
      • 1...Kd6
        • 2.Qb4#
      • 1...Sd6
        • 2.Sfxd7#
      • 1...d3
        • 2.Qb4#
      • 1...e4
        • 2.Sfxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);::QAB1(A)
    • S(f);N_GUARD::QAR1(A),XS(c)
    • P(b);::S(H),XP(g)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(H)
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::QAB(A)
        • P(b);::QAB1(A)
        • P(e);::S(H),XP(g)
      • Refutation
        • P(b);CHECK,XS(E)
    • Try
      • R(I);CHECK,XS(c)
      • Refutation
        • S(f);XR(I)
  • Actual
    • S(E);
    • Threat
      • S(H)
    • Vars
      • K(d);P_SPINP(e),S_FLIGHT::QAB(A)
      • S(c);SBLOCK::S(H),XP(g)
      • P(b);::QAB1(A)
      • P(e);::S(H),XP(g)
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