MESON Chess Problem Database

Problem Display
PID: 22022 (3K4/6p1/n2P1P1b/1P1kBQ2/1p2rp2/3Npn2/1P4B1/2R4b w - - 0 1)

Ellerman, Arnoldo

Comm., Good Companions (February), 1923

3K4/6p1/n2P1P1b/1P1kBQ2/1p2rp2/3Npn2/1P4B1/2R4b

#2

10 + 10

5137 1001 Problemas 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Bxf4#
    • 1...Rxe5
      • 2.Qxe5#
    • 1...Sxe5
      • 2.Qxe5#
    • 1...Sg5
      • 2.Sxf4#
    • 1...Sc5
      • 2.Rxc5#
    • 1...Sc7
      • 2.Rc5#
    • 1...Sb8
      • 2.Rc5#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Qe6#
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rc4
        • 2.Bc3#
      • 1...Rd4
        • 2.Bxf4#
      • 1...Sd4
        • 2.Qxe4#
      • 1...Sg5
        • 2.Sxf4#
      • 1...Sc7
        • 2.Rc5#
      • 1...Sb8+!
    • 1.Bd4+?
      • 1...Kxd6
        • 2.Rc6#
        • 2.Qd7#
      • 1...Re5
        • 2.Qxe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Bxf4+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Kd4!
    • 1.bxa6?
      • threat
        • 2.Rc5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Rc4!
  • Keys
    • 1.Ke7!
      • threat
        • 2.Qe6#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Sxe5
        • 2.Qxe4#
        • 2.Qxe5#
      • 1...Rc4
        • 2.Bc3#
      • 1...Rd4
        • 2.Bxf4#
      • 1...Sd4
        • 2.Qxe4#
      • 1...Sg5
        • 2.Sxf4#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sc7
        • 2.Rc5#

This is a version of 138835

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD,P_SPINS(c),SBLOCK::QAR(G)+B(F),XP(f)
    • R(e);OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XR(e)
    • S(c);OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XS(c)
    • S(c);P_SPINR(e),S_CUTB(i)::S(D),XP(f)
    • S(h);N_GUARD::R1(A),XS(h)
    • S(h);N_GUARD::R1(A)
  • Tries
    • Try
      • K(J);P-FLIGHT
      • Threat
        • QAB1(G)
      • Vars
        • S(c);CHECK,OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XS(c)
        • S(h);CHECK,N_GUARD::R1(A),XS(h)
        • R(e);OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XR(e)
        • R(e);N_GUARD,P_SPINS(c),SBLOCK::QAR(G)+B(F)
        • R(e);N_GUARD,P_SPINS(c),SBLOCK::QAR(G)+B(F),XP(f)
        • S(c);P_SPINR(e)::QAB1(G),XR(e)
        • S(c);P_SPINR(e),S_CUTB(i)::S(D),XP(f)
        • S(h);N_GUARD::R1(A)
      • Refutation
        • S(h);CHECK
    • Try
      • B(F);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e),P_SPINS(c)::QAR1(G),XR(e)
        • S(c);N_GUARD,P_SPINR(e),P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(g);P-FLIGHT,XB(F)
    • Try
      • B(F);CHECK,XP(f)
      • Vars
        • R(e);N_GUARD,P_SPINR(e),P_SPINS(c)::QAR1(G),XR(e)
        • S(c);N_GUARD,P_SPINR(e),P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • P(E);XS(h)
      • Threat
        • R1(A)
      • Vars
        • R(e);OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XR(e)
        • S(c);OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XS(c)
      • Refutation
        • R(e);P_SPINS(c)
  • Actual
    • K(J);P_SPINB(F),S_FLIGHT
    • Threat
      • QAB1(G)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),P_SPINS(c),XB(F)::QAR1(G),XR(e)
      • R(e);N_PINB(F),P_SPINS(c),SBLOCK::QAR(G)+B(F)
      • R(e);N_PINB(F),P_SPINS(c),SBLOCK::QAR(G)+B(F),XP(f)
      • S(c);P_SPINR(e)::QAB1(G),XR(e)
      • S(c);P_SPINR(e),S_CUTB(i)::S(D),XP(f)
      • S(h);N_GUARD::R1(A),XS(h)
      • S(h);N_GUARD::R1(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).