MESON Chess Problem Database

Problem Display
PID: 207811 (4q2Q/2p3B1/1PR1P1p1/NK2Nr2/3k1p2/1R1ppB2/1r1b4/1b6 w - - 0 1)

Ellerman, Arnoldo

Il Problema, 1932

4q2Q/2p3B1/1PR1P1p1/NK2Nr2/3k1p2/1R1ppB2/1r1b4/1b6

#2

10 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6+
      • 2.Sxc6#
    • 1...Qf7
      • 2.Rc4#
    • 1...Qe7
      • 2.Rc4#
    • 1...Qa8
      • 2.Rc4#
    • 1...Qb8
      • 2.Rc4#
    • 1...Qc8
      • 2.Rc4#
    • 1...Qd8
      • 2.Rc4#
      • 2.Qxd8#
    • 1...Qf8
      • 2.Rc4#
    • 1...Qg8
      • 2.Rc4#
    • 1...Qxh8
      • 2.Rc4#
    • 1...Rc2
      • 2.Rxd3#
    • 1...Rxb3+
      • 2.Sxb3#
    • 1...Rxe5+
      • 2.Bxe5#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Rf8
      • 2.Sf7#
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qc5#
      • 1...Qxc6+
        • 2.Sxc6#
      • 1...Rxb3+
        • 2.Sxb3#
      • 1...Qxf8
        • 2.Rc4#
      • 1...Rxf8
        • 2.Sf7#
      • 1...cxb6
        • 2.Qd6#
      • 1...Qe7
        • 2.Rc4#
      • 1...Rc2
        • 2.Rxd3#
      • 1...Bb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(k);CHECK,XR(G)::S(C),XQ(k)
    • Q(k);OGATE::R1(G)
    • Q(k);OGATE,P_PINP(F)::R1(G)
    • Q(k);OGATE,XQ(J)::R1(G)
    • R(b);N_PINR(A),P_PINR(G)::R1(A),XP(d)
    • R(b);CHECK,P_PINR(G),XR(A)::S(C),XR(b)
    • R(h);CHECK,OGATE,P_SPINR(h),XS(E)::B(I),XR(h)
    • R(h);N_PINS(E)::B(I)+S(E),XR(h)
    • R(h);N_PINS(E)::B(I)+S(E)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • Q(k);CHECK,XR(G)::S(C),XQ(k)
      • R(b);CHECK,P_PINR(G),XR(A)::S(C),XR(b)
      • Q(k);OGATE,XQ(J)::R1(G)
      • R(h);N_PINS(E),XQ(J)::B(I)+S(E)
      • P(j);N_GUARD,XP(F)::QAR2(J)
      • Q(k);OGATE::R1(G)
      • R(b);N_PINR(A),P_PINR(G)::R1(A),XP(d)
      • B(c);N_GUARD,N_PINR(A),P_PINR(G)::QAR2(J),XB(c)
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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).