MESON Chess Problem Database

Problem Display
PID: 31469 (1R2q1B1/2p2Rb1/2N5/P1B3pK/2k1P3/2p1Q3/n7/8 w - - 0 1)

Ellerman, Arnoldo

HM., Bristol Times and Mirror, 1927

1R2q1B1/2p2Rb1/2N5/P1B3pK/2k1P3/2p1Q3/n7/8

#2

9 + 7

56 The Problemist 1927
268 Chess Life 1954

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Rxd7#
    • 1...Qxf7+
      • 2.Bxf7#
    • 1...Qxe4
      • 2.Rf4#
    • 1...Qe7
      • 2.Rxe7#
    • 1...Qf8
      • 2.Rfxf8#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bh6
      • 2.Qd4#
    • 1...Bf8
      • 2.Qd4#
    • 1...Sc1
      • 2.Rb4#
    • 1...Sb4
      • 2.Rxb4#
  • Tries
    • 1.Qd3+?
      • 1...Kxc5
        • 2.Qd5#
      • 1...Kxd3!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qe2#
      • 1...Qxf7+
        • 2.Bxf7#
      • 1...Qxc6
        • 2.Rxc7#
      • 1...Qxe4
        • 2.Rf4#
      • 1...Qxb8
        • 2.Rf5#
      • 1...Qxf8
        • 2.Rfxf8#
      • 1...Bxf8
        • 2.Qd4#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Qd8
        • 2.Rd7#
      • 1...Qd7
        • 2.Rxd7#
      • 1...Qe7
        • 2.Rxe7#
      • 1...Sc1
        • 2.Rb4#
      • 1...c2
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_PINR(G)::B(I)+R(G),XQ(g)
    • Q(g);CHECK,OGATE,P_SPINQ(g),XR(G)::B(I),XQ(g)
    • Q(g);N_PINR(G),XP(B)::B(I)+R(G)
    • B(f);N_GUARD::QAR1(A),XB(f)
    • B(f);N_GUARD::QAR1(A)
    • S(a);N_GUARD::R1(H)
    • S(a);N_GUARD::R1(H),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(D)::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • B(D);
    • Threat
      • QAB(A)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XR(G)::B(I),XQ(g)
      • Q(g);N_PINR(G),XS(F)::B(I)+R(G),XP(e)
      • Q(g);N_PINR(G),XP(B)::B(I)+R(G)
      • Q(g);N_PINR(G),XR(H)::B(I)+R(G)
      • Q(g);N_PINR(G),XB(D)::B(I)+R(G),XQ(g)
      • B(f);N_GUARD,XB(D)::QAR1(A)
      • S(a);N_GUARD::R1(H),XS(a)
      • Q(g);N_PINR(G)::B(I)+R(G)
      • Q(g);N_PINR(G)::B(I)+R(G),XQ(g)
      • S(a);N_GUARD::R1(H)
      • P(b);OGATE::QAB1(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).