MESON Chess Problem Database

Problem Display
PID: 198158 (2b1R2b/1N2n3/2PB1p1N/1KR1q3/1p2k3/7p/B1pPP3/Q7 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1920

2b1R2b/1N2n3/2PB1p1N/1KR1q3/1p2k3/7p/B1pPP3/Q7

#2

11 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Bd5#
    • 1...Qg3
      • 2.Bd5#
    • 1...Qd4
      • 2.Qh1#
    • 1...Qf4
      • 2.Bd5#
    • 1...Qxc5+
      • 2.Sxc5#
    • 1...Qd5
      • 2.Bxd5#
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Sd6#
        • 2.Qd4#
        • 2.Qh1#
      • 1...Bxb7
        • 2.Qd4#
        • 2.Qh1#
      • 1...Sxc6
        • 2.Sd6#
        • 2.Bd5#
        • 2.Qh1#
      • 1...c1Q
        • 2.Sd6#
        • 2.Qd4#
      • 1...c1S
        • 2.Sd6#
        • 2.Qd4#
      • 1...c1B
        • 2.Sd6#
        • 2.Bb1#
        • 2.Qd4#
        • 2.Qb1#
      • 1...c1R
        • 2.Sd6#
        • 2.Qd4#
      • 1...Bg4
        • 2.Sd6#
        • 2.Qd4#
      • 1...Sf5
        • 2.Bd5#
        • 2.Qh1#
      • 1...fxe5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qe3#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Kf4
        • 2.Qe3#
      • 1...Qc3
        • 2.Bd5#
      • 1...Qg3
        • 2.Bd5#
      • 1...Qd4
        • 2.Qh1#
      • 1...Qf4
        • 2.Bd5#
        • 2.d3#
      • 1...Qg5
        • 2.d3#
      • 1...Sd5
        • 2.Rc4#
      • 1...Sf5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD,N_PINR(F),P_SPINS(g)::B(B)
    • Q(e);N_PINR(F),P_SPINS(g),SBLOCK::QAB(A)
    • Q(e);CHECK,P_SPINS(g),XR(F)::S(J),XQ(e)
    • Q(e);N_GUARD,P_SPINS(g)::B(B),XQ(e)
    • S(g);N_PINR(F),P_SPINQ(e),SBLOCK::R(F)
  • Tries
    • Try
      • B(H);N_SPINR(F),XQ(e)
      • Threat
        • DUALS(3)
      • Refutation
        • P(f);XB(H)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(e);CHECK,P_SPINS(g),XR(F)::S(J),XQ(e)
      • K(d);P-FLIGHT,P_SPINQ(e)::QAB1(A)
      • Q(e);N_GUARD,N_PINR(F),P_SPINS(g)::B(B)
      • Q(e);N_PINR(F),P_SPINS(g),SBLOCK::QAB(A)
      • Q(e);P_SPINS(g)::P(C)
      • S(g);N_PINR(F),P_SPINQ(e),SBLOCK::R(F)
      • S(g);P_SPINQ(e),S_CUTB(h)::QAR2(A)
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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).