MESON Chess Problem Database

Problem Display
PID: 179724 (5r2/BB5p/8/2R2b2/3k3K/1Pp1p3/qn1P1n2/1N3rN1 w - - 0 1)

Kopnin, Aleksey Grigorevich

2nd HM., Kommunar, 1973

5r2/BB5p/8/2R2b2/3k3K/1Pp1p3/qn1P1n2/1N3rN1

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rxc3#
    • 1...Bd3
      • 2.Ra5#
      • 2.dxc3#
    • 1...Be4
      • 2.Rd5#
    • 1...Sbd3
      • 2.Se2#
      • 2.Sf3#
      • 2.dxc3#
    • 1...Sfd3
      • 2.Se2#
      • 2.dxc3#
    • 1...Se4
      • 2.Rd5#
  • Tries
    • 1.Rxc3+?
      • 1...Qxa7
        • 2.Sf3#
      • 1...Ke5!
    • 1.Rc4+?
      • 1...Kd3
        • 2.Rxc3#
      • 1...Ke5!
    • 1.dxe3+?
      • 1...Kd3
        • 2.Rxc3#
      • 1...Kxe3!
  • Keys
    • 1.d3!
      • threat
        • 2.Rd5#
      • 1...Kxd3
        • 2.Rxc3#
      • 1...Bxd3
        • 2.Ra5#
      • 1...Sbxd3
        • 2.Sf3#
      • 1...Sfxd3
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(g);P-FLIGHT::R1(F),XP(e)
    • B(h);SBLOCK::B(G)+R(F),DCHECK
    • S(d);SBLOCK::B(G)+R(F),DCHECK
  • Tries
    • Try
      • R(F);CHECK,XP(e)
      • Vars
        • Q(b);XB(G)::S(B)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(g);P-FLIGHT::R1(F),XP(e)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • P(C);CHECK,XP(f)
      • Vars
        • K(g);P-FLIGHT::R1(F),XP(e)
      • Refutation
        • K(g);S_FLIGHT,XP(C)
  • Actual
    • P(C);
    • Threat
      • B(G)+R(F),DCHECK
    • Vars
      • K(g);P-FLIGHT,XP(C)::R1(F),XP(e)
      • B(h);SBLOCK,XP(C)::B(G)+R(F)
      • S(c);SBLOCK,XP(C)::S(B)
      • S(d);SBLOCK,XP(C)::S(B)
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