MESON Chess Problem Database

Problem Display
PID: 179046 (B5NQ/K3N1q1/7P/2PPkn2/3p3R/5Rp1/8/1b3r2 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Magasinet, 1932

B5NQ/K3N1q1/7P/2PPkn2/3p3R/5Rp1/8/1b3r2

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sg6#
      • 2.Qxf6#
    • 1...Qxh8
      • 2.Sg6#
    • 1...Se3
      • 2.Qxg7#
    • 1...Sd6
      • 2.Qxg7#
    • 1...Sxh6
      • 2.Qxg7#
    • 1...Sxe7
      • 2.Qxg7#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Sg6#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Sxh6
        • 2.Qxg7#
      • 1...Sxe7
        • 2.Qxg7#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qxg7#
      • 1...Sxh4!
    • 1.Kb8?
      • threat
        • 2.Sg6#
      • 1...Sxh6
        • 2.Qxg7#
      • 1...Sxe7
        • 2.Qxg7#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qxg7#
      • 1...Sxh4!
    • 1.Bb7?
      • threat
        • 2.Sg6#
      • 1...Sxh6
        • 2.Qxg7#
      • 1...Sxe7
        • 2.Qxg7#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qxg7#
      • 1...Sxh4!
    • 1.Rxf5+?
      • 1...Bxf5
        • 2.Qxg7#
      • 1...Rxf5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Qxg7#
      • 1...Qxf6
        • 2.Sg6#
      • 1...Sxh4
        • 2.Qb8#
      • 1...Qg4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_PINS(G),N_SPINQ(g),XQ(J)::S(G)
    • S(f);N_GUARD::QAB(J),XQ(g)
    • S(f);N_GUARD,XP(E)::QAB(J),XQ(g)
    • S(f);N_GUARD,XS(G)::QAB(J),XQ(g)
  • Tries
    • Try
      • K(F);N_SPINS(G),S_FLIGHT
      • Threat
        • S(G)
      • Vars
        • Q(g);CHECK,OGATE::QAB1(J),XQ(g)
        • S(f);N_GUARD,XP(E)::QAB(J),XQ(g)
        • S(f);N_GUARD,XS(G)::QAB(J),XQ(g)
        • S(f);N_GUARD::QAB(J),XQ(g)
      • Refutation
        • S(f);XR(B)
    • Try
      • K(F);N_SPINS(G),S_FLIGHT
      • Threat
        • S(G)
      • Vars
        • S(f);N_GUARD,XP(E)::QAB(J),XQ(g)
        • S(f);N_GUARD,XS(G)::QAB(J),XQ(g)
        • S(f);N_GUARD::QAB(J),XQ(g)
      • Refutation
        • S(f);XR(B)
    • Try
      • B(H);N_SPINS(G)
      • Threat
        • S(G)
      • Vars
        • S(f);N_GUARD,XP(E)::QAB(J),XQ(g)
        • S(f);N_GUARD,XS(G)::QAB(J),XQ(g)
        • S(f);N_GUARD::QAB(J),XQ(g)
      • Refutation
        • S(f);XR(B)
    • Try
      • R(A);CHECK,XS(f)
      • Vars
        • B(a);XR(A)::QAB(J),XQ(g)
      • Refutation
        • R(b);XR(A)
  • Actual
    • S(I);N_PINQ(g)
    • Threat
      • S(I)
    • Vars
      • K(e);OGATEB,P_SPINQ(g),P_SPINS(f),S_FLIGHT,XS(I)::QAB1(J),XQ(g)
      • Q(g);N_PINS(G),P_SPINQ(g),XS(I)::S(G)
      • S(f);N_GUARD,XR(B)::QAB(J)
      • Q(g);N_PINS(G)::S(G)
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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).