MESON Chess Problem Database

Problem Display
PID: 22915 (8/3K1p2/BN3B2/b1k5/1N6/2p1P3/2P5/8 w - - 0 1)

Mari, Alberto

5th Prize, Lazard MT, 1949

8/3K1p2/BN3B2/b1k5/1N6/2p1P3/2P5/8

#2

7 + 4

3105 FIDE Album (1945-1955) 1964
3310 2345 Chess Problems 1997
5454 Near Snap 2013
3713 Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb4
      • 2.Be7#
    • 1...Kxb6
      • 2.Bd4#
    • 1...Bxb4
      • 2.Bd4#
    • 1...Bxb6
      • 2.Be7#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Sd3#
        • 2.Be7#
      • 1...Kxb4
        • 2.Be7#
      • 1...Bxb4
        • 2.Bd4#
        • 2.Be7#
      • 1...Bxb6+!
    • 1.S6d5?
      • threat
        • 2.Bd4#
        • 2.Be7#
      • 1...Bc7
        • 2.Bd4#
      • 1...Bd8
        • 2.Bd4#
      • 1...Bxb4!
    • 1.Bf1?
      • 1...Kxb4
        • 2.Be7#
      • 1...Bxb4
        • 2.Bd4#
      • 1...Bxb6
        • 2.Be7#
      • 1...Kxb6!
    • 1.Be2?
      • 1...Kxb4
        • 2.Be7#
      • 1...Bxb4
        • 2.Bd4#
      • 1...Bxb6
        • 2.Be7#
      • 1...Kxb6!
    • 1.Bd3?
      • 1...Kxb4
        • 2.Be7#
      • 1...Bxb4
        • 2.Bd4#
      • 1...Bxb6
        • 2.Be7#
      • 1...Kxb6!
    • 1.Bxc3?
      • threat
        • 2.Sa4#
      • 1...Kxb6
        • 2.Bd4#
      • 1...Bxb4
        • 2.Bd4#
      • 1...Bxb6!
    • 1.Bd8?
      • threat
        • 2.Sd3#
      • 1...Kxb4
        • 2.Be7#
      • 1...Bxb6
        • 2.Be7#
      • 1...Bxb4!
  • Keys
    • 1.e4!
      • 1...Kxb4
        • 2.Be7#
      • 1...Kxb6
        • 2.Bd4#
      • 1...Bxb4
        • 2.Sa4#
      • 1...Bxb6
        • 2.Sd3#

Anticipated by 189473(1911)

This anticipates 96673(1974-1976)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XS(C)::B(F)
    • K(c);S_FLIGHT,XS(E)::B(F)
    • B(b);SBLOCK,XS(C)::B(F)
    • B(b);SBLOCK,XS(E)::B(F)
  • Tries
    • Try
      • K(G);P-FLIGHT,P_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(F)
      • Refutation
        • B(b);CHECK,XS(E)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::B(F)
      • Refutation
        • B(b);XS(C)
    • Try
      • B(D);
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(F)
        • B(b);SBLOCK,XS(C)::B(F)
        • B(b);SBLOCK,XS(E)::B(F)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • B(D);
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(F)
        • B(b);SBLOCK,XS(C)::B(F)
        • B(b);SBLOCK,XS(E)::B(F)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • B(D);
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(F)
        • B(b);SBLOCK,XS(C)::B(F)
        • B(b);SBLOCK,XS(E)::B(F)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • B(F);XP(a)
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT,XS(E)::B(F)
        • B(b);SBLOCK,XS(C)::B(F)
      • Refutation
        • B(b);XS(E)
    • Try
      • B(F);
      • Threat
        • S(C)
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(F)
        • B(b);SBLOCK,XS(E)::B(F)
      • Refutation
        • B(b);XS(C)
  • Actual
    • P(B);
    • Vars
      • K(c);S_FLIGHT,XS(C)::B(F)
      • K(c);S_FLIGHT,XS(E)::B(F)
      • B(b);SBLOCK,XS(C)::S(E)
      • B(b);SBLOCK,XS(E)::S(C)
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