MESON Chess Problem Database

Problem Display
PID: 255030 (4R3/6p1/B2BK3/2P1b1PQ/3pkp2/1P2r2P/2N3N1/4r3 w - - 0 1)

Erokhin, Vladimir Alekseevich

Sinfonie Scacchistiche, 1981

4R3/6p1/B2BK3/2P1b1PQ/3pkp2/1P2r2P/2N3N1/4r3

#2

11 + 7

15601 Albrecht-Leiss-Degener Collection 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Bb7#
    • 1...Rf3
      • 2.Qg6#
    • 1...d3
      • 2.Bb7#
    • 1...f3
      • 2.Qg6#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Rxe5#
      • 1...Kd5
        • 2.Bb7#
      • 1...Kf5!
    • 1.Sh4?
      • threat
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...f3!
    • 1.Qh7+?
      • 1...g6
        • 2.Qb7#
      • 1...Kf3!
  • Keys
    • 1.Kf7!
      • threat
        • 2.Rxe5#
      • 1...Kd5
        • 2.Bb7#
      • 1...Kf5
        • 2.Qg6#

This anticipates 99841(1982)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(b);SBLOCK::B(H)
    • R(b);SBLOCK::QAB(G)
    • P(c);SBLOCK::B(H)
    • P(e);SBLOCK::QAB(G)
  • Tries
    • Try
      • K(J);P_PINB(f),S_FLIGHT
      • Threat
        • R1(K),XB(f)
      • Vars
        • K(d);N_GUARD,N_SPINB(f),S_FLIGHT::B(H)
      • Refutation
        • K(d);N_SPINB(f),S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB(G)
      • Vars
        • P(g);::QAB(G),XP(g)
      • Refutation
        • P(e);
    • Try
      • Q(G);CHECK
      • Vars
        • P(g);OGATE,P_SPINP(g)::QAB(G)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • K(J);P_PINB(f),S_FLIGHT
    • Threat
      • R1(K),XB(f)
    • Vars
      • K(d);N_GUARD,N_SPINB(f),S_FLIGHT::B(H)
      • K(d);N_GUARD,N_SPINB(f),S_FLIGHT::QAB1(G)
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