MESON Chess Problem Database

Problem Display
PID: 203797 (8/2p1Kp2/5B2/pP1kN1n1/N1pp4/2P2P1n/6B1/2R5 w - - 0 1)

Pass, Joseph

Western Daily Mercury, 1920

(First published on Fri Nov 12 1920)

8/2p1Kp2/5B2/pP1kN1n1/N1pp4/2P2P1n/6B1/2R5

#2

9 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Bxf3#
    • 1...Se4
      • 2.fxe4#
    • 1...Se6
      • 2.f4#
    • 1...Sh7
      • 2.f4#
    • 1...dxc3
      • 2.Rd1#
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Rxd4#
      • 1...Se6
        • 2.f4#
      • 1...c5
        • 2.Sb6#
      • 1...d3!
    • 1.f4+?
      • 1...Sf3
        • 2.Bxf3#
      • 1...Se4!
  • Keys
    • 1.Sd3!
      • 1...Sxf3
        • 2.Bxf3#
      • 1...cxd3
        • 2.c4#
      • 1...dxc3
        • 2.Sxc3#
      • 1...Sg1
        • 2.Sf4#
      • 1...Sf2
        • 2.Sf4#
      • 1...Sf4
        • 2.Sxf4#
      • 1...Se4
        • 2.fxe4#
      • 1...Se6
        • 2.f4#
      • 1...Sh7
        • 2.f4#
      • 1...c5
        • 2.Sb6#
      • 1...c6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE,P_SPINS(f),XP(D)::B(B),XS(f)
    • S(f);OGATE::P(D),XS(f)
    • S(f);N_GUARD::B(B)+P(D)
    • P(c);OGATEB,XP(C)::R(A)
    • P(g);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • R(A);P_PINP(c)
      • Threat
        • R1(A),XP(c)
      • Vars
        • S(f);N_GUARD::B(B)+P(D)
        • P(g);N_GUARD,SBLOCK::S(E)
      • Refutation
        • P(c);
    • Try
      • P(D);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::B(B),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(G);
    • Vars
      • S(f);OGATE,P_SPINS(f),XP(D)::B(B),XS(f)
      • P(b);OGATE,XS(G)::P(C)
      • P(c);XP(C)::S(E),XP(c)
      • S(a);N_GUARD::S(G)
      • S(a);N_GUARD::S(G),XS(a)
      • S(f);OGATE::P(D),XS(f)
      • S(f);N_GUARD::B(B)+P(D)
      • P(g);N_GUARD::S(E)
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