MESON Chess Problem Database

Problem Display
PID: 101016 (1bn1Rr2/r2p1k1P/1pp4K/6B1/3P4/2Q5/2p1B3/2nbR3 w - - 0 1)

Janet, Frank

Good Companions (February), 1917

1bn1Rr2/r2p1k1P/1pp4K/6B1/3P4/2Q5/2p1B3/2nbR3

#2

8 + 11

15 British Chess Magazine 1917
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe8
      • 2.Bh5#
    • 1...Rg8
      • 2.hxg8Q#
    • 1...Bd6
      • 2.Bc4#
    • 1...Sd6
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qg6#
      • 1...Kxe8
        • 2.Bh5#
      • 1...Rxe8
        • 2.Qf5#
      • 1...Se7
        • 2.Rxe7#
      • 1...Rg8
        • 2.hxg8Q#
      • 1...Sxd3!
    • 1.Qf3+?
      • 1...Bf4
        • 2.Qh5#
      • 1...Kxe8!
    • 1.Qh3?
      • threat
        • 2.Qh5#
      • 1...Kxe8
        • 2.Bh5#
      • 1...Rxe8
        • 2.Qf5#
      • 1...Rg8
        • 2.hxg8Q#
      • 1...Se7
        • 2.Rxe7#
      • 1...Bxe2!
    • 1.Qc4+?
      • 1...Kxe8
        • 2.Bh5#
      • 1...d5!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qg6#
      • 1...Kxe8
        • 2.Bh5#
      • 1...Rxe8
        • 2.Qf6#
      • 1...dxc6
        • 2.Bc4#
      • 1...Rg8
        • 2.hxg8Q#
      • 1...Bd6
        • 2.Bc4#
      • 1...Sd6
        • 2.Re7#
      • 1...Se7
        • 2.Rxe7#
      • 1...d6
        • 2.Rf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(h);S_FLIGHT,XR(H)::R(A)+B(B),DCHECK
    • R(k);OGATE::PXR(k)=Q
    • B(i);S_CUTP(g)::B(B)
    • S(j);N_GUARD::R1(H)
    • S(j);N_GUARD::R1(H),XS(j)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(h);S_FLIGHT,XR(H)::R(A)+B(B),DCHECK
        • R(k);SBLOCK,XR(H)::QAR2(C)
        • S(j);N_GUARD::R1(H),XS(j)
        • R(k);OGATE::PXR(k)=Q
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);P_PINB(E),P_SPINB(i)::QAB(C)
      • Refutation
        • K(h);S_FLIGHT,XR(H)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • K(h);S_FLIGHT,XR(H)::R(A)+B(B),DCHECK
        • R(k);SBLOCK,XR(H)::QAR2(C)
        • R(k);OGATE::PXR(k)=Q
        • S(j);N_GUARD::R1(H),XS(j)
      • Refutation
        • B(b);XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);S_FLIGHT,XR(H)::R(A)+B(B),DCHECK
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(C);XP(e)
    • Threat
      • QAB1(C)
    • Vars
      • K(h);P_SPINP(g),S_FLIGHT,XR(H)::R(A)+B(B),DCHECK
      • R(k);SBLOCK,XR(H)::QAR1(C)
      • P(g);N_GUARD,XQ(C)::B(B)
      • R(k);OGATE::PXR(k)=Q
      • B(i);S_CUTP(g)::B(B)
      • S(j);N_GUARD::R1(H)
      • S(j);N_GUARD::R1(H),XS(j)
      • P(g);S_CUTB(i)::R(A)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).