MESON Chess Problem Database

Problem Display
PID: 268393 (2N5/r4p1K/2Q2P2/2b2kp1/1R2n1p1/6P1/bBNpRn1P/3r4 w - - 0 1)

Chicco, Adriano

3rd HM., Israel Problemists' Association TT, 1948-1950

2N5/r4p1K/2Q2P2/2b2kp1/1R2n1p1/6P1/bBNpRn1P/3r4

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qd5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bxb4
      • 2.Se3#
    • 1...Be7
      • 2.Se3#
    • 1...Bf8
      • 2.Se3#
    • 1...Sh1
      • 2.Qxe4#
    • 1...Sd3
      • 2.Qxe4#
    • 1...Sh3
      • 2.Qxe4#
    • 1...Sxg3
      • 2.Re5#
    • 1...Sxf6+
      • 2.Qxf6#
  • Tries
    • 1.Se7+?
      • 1...Bxe7
        • 2.Se3#
      • 1...Rxe7!
    • 1.Rxf2+?
      • 1...Bxf2
        • 2.Qxe4#
      • 1...Sxf2!
    • 1.Qxc5+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sxc5
        • 2.Sd6#
      • 1...Ke6!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Se3#
      • 1...Sxf6+
        • 2.Qxf6#
      • 1...Sxg3
        • 2.Rxf2#
      • 1...Ra3
        • 2.Se7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sc3
        • 2.Sd4#
      • 1...Sd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • B(b);N_GUARD::QAR2(G)
    • B(b);N_GUARD::QAR2(G),XB(b)
    • B(g);N_GUARD::S(B),XB(g)
    • B(g);N_GUARD,XR(F)::S(B)
    • B(g);N_GUARD::S(B)
    • S(d);N_GUARD::QAB1(G),XS(e)
    • S(e);OGATE,XP(E)::R1(C)
    • S(e);CHECK,OGATE,XP(H)::QAR1(G),XS(e)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • B(g);XS(J)::S(B)
      • Refutation
        • R(j);XS(J)
    • Try
      • R(C);CHECK,XS(d)
      • Vars
        • B(g);XR(C)::QAB1(G),XS(e)
      • Refutation
        • S(e);XR(C)
    • Try
      • Q(G);CHECK,XB(g)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(G),XB(b)
        • S(e);XQ(G)::S(J)
      • Refutation
        • K(h);P_SPINS(e),S_FLIGHT
  • Actual
    • R(F);P_PINB(g)
    • Threat
      • S(B)
    • Vars
      • S(e);CHECK,OGATE,XP(H)::QAR1(G),XS(e)
      • S(e);N_GUARD,XP(E)::R(C),XS(d)
      • R(j);N_GUARD::S(J)
      • B(b);N_GUARD,N_SPINB(g)::QAR2(G),XB(b)
      • S(e);::S(B)
      • S(e);N_GUARD::S(J),XS(e)
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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).