MESON Chess Problem Database

Problem Display
PID: 83488 (4n1B1/5r1r/1p1p4/b4Q2/2k3N1/1RN1P2p/1PP1bK2/6n1 w - - 0 1)

Ellerman, Arnoldo

Good Companions (March), 1917

4n1B1/5r1r/1p1p4/b4Q2/2k3N1/1RN1P2p/1PP1bK2/6n1

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qb5#
    • 1...Sf3
      • 2.Qb5#
      • 2.Qd5#
    • 1...Sf6
      • 2.Qc8#
      • 2.Qb5#
  • Tries
    • 1.Bxf7+?
      • 1...d5
        • 2.Qxd5#
      • 1...Rxf7!
    • 1.Qxf7+?
      • 1...Kc5
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Rxf7+!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qf4#
      • 1...Bxc3
        • 2.b3#
      • 1...Bd3
        • 2.cxd3#
      • 1...Bf3
        • 2.Qd3#
      • 1...Sf3
        • 2.Qd5#
      • 1...Sf6
        • 2.Qc8#
      • 1...d5
        • 2.Se5#

There are these versions: 64888

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(b);N_PINQ(H)::QAB1(H)
  • Tries
    • Try
      • B(I);CHECK,N_SPINQ(H),XR(h)
      • Vars
        • P(g);P_SPINP(g)::QAB1(H),XP(g)
      • Refutation
        • R(i);P_PINQ(H),XB(I)
    • Try
      • Q(H);CHECK,N_SPINQ(H),XR(h)
      • Vars
        • K(d);P-FLIGHT::QAR1(H)
        • P(g);P_SPINP(g)::QAB1(H),XP(g)
      • Refutation
        • R(i);CHECK,P_SPINR(i),XQ(H)
  • Actual
    • R(D);
    • Threat
      • QAR(H)
    • Vars
      • B(e);SBLOCK,XS(E)::P(A)
      • B(b);OGATE::P(B),XB(b)
      • B(b);N_PINQ(H)::QAB1(H)
      • S(a);N_PINQ(H)::QAB1(H)
      • S(j);N_PINQ(H)::QAR(H)
      • P(g);N_GUARD,N_SPINR(h)::S(G)
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).