MESON Chess Problem Database

Problem Display
PID: 196911 (3KRBb1/2R2P2/4NP2/2pkpP2/2r1rP2/3P4/1bnPn3/1Q3Bq1 w - - 0 1)

Bland, Jas

British Chess Magazine, 1919

3KRBb1/2R2P2/4NP2/2pkpP2/2r1rP2/3P4/1bnPn3/1Q3Bq1

#2

13 + 10

3713 Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rcd4
      • 2.Rxc5#
    • 1...Ba1
      • 2.Qb7#
    • 1...Bc1
      • 2.Qb7#
    • 1...Ba3
      • 2.Qb7#
    • 1...Bc3
      • 2.Qb7#
    • 1...Bd4
      • 2.Qb7#
    • 1...Scd4
      • 2.dxe4#
    • 1...Sed4
      • 2.dxc4#
  • Tries
    • 1.Ree7?
      • threat
        • 2.Red7#
      • 1...Kd6
        • 2.Red7#
      • 1...exf4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rd7#
      • 1...Kxd4
        • 2.Rd7#
      • 1...Qxd4
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rcxd4
        • 2.Rxc5#
      • 1...Rexd4
        • 2.Rxe5#
      • 1...Bxd4
        • 2.Qb7#
      • 1...Scxd4
        • 2.dxe4#
      • 1...Sexd4
        • 2.dxc4#
      • 1...cxd4
        • 2.dxc4#
      • 1...exd4
        • 2.dxe4#

Anticipated by 21060(1916)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD,S_CUTQ(a)::R1(I),XP(g)
    • B(b);OGATE::QAB(A)
    • S(c);S_CUTR(e)::P(D),XR(f)
    • S(d);S_CUTR(f)::P(D),XR(e)
  • Tries
    • Try
      • R(L);
      • Threat
        • R(L)
      • Vars
        • K(h);P-FLIGHT::B(M)+R(L),DCHECK
      • Refutation
        • P(i);XP(E)
  • Actual
    • S(G);
    • Threat
      • R(I)
    • Vars
      • K(h);P-FLIGHT,XS(G)::R(I)
      • Q(a);N_GUARD,SBLOCK,XS(G)::PXB(j)=Q
      • R(e);N_GUARD,SBLOCK,XS(G)::R1(I),XP(g)
      • R(f);N_GUARD,SBLOCK,XS(G)::R1(L),XP(i)
      • B(b);OGATE,SBLOCK,XS(G)::QAB(A)
      • S(c);SBLOCK,XS(G)::P(D),XR(f)
      • S(d);SBLOCK,XS(G)::P(D),XR(e)
      • P(g);SBLOCK,XS(G)::P(D),XR(e)
      • P(i);SBLOCK,XS(G)::P(D),XR(f)
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