MESON Chess Problem Database

Problem Display
PID: 195179 (3BRqB1/5r2/nR1pP1p1/2p1k1p1/6P1/2K1pP2/7b/3QN3 w - - 0 1)

Martin, Ernst Otto

2nd Prize, Deutsche Schachzeitung, 1918-09

3BRqB1/5r2/nR1pP1p1/2p1k1p1/6P1/2K1pP2/7b/3QN3

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Qxd6#
    • 1...Qg7
      • 2.Qxd6#
    • 1...Qxe8
      • 2.Qxd6#
    • 1...Qxg8
      • 2.Qxd6#
    • 1...c4
      • 2.Qd4#
    • 1...d5
      • 2.Sd3#
  • Tries
    • 1.exf7+?
      • 1...Qe7
        • 2.Qxd6#
      • 1...Qxe8
        • 2.Qxd6#
      • 1...Kf4!
  • Keys
    • 1.e7!
      • threat
        • 2.Qxd6#
      • 1...Kf4
        • 2.Qxd6#
      • 1...Ke6
        • 2.exf8S#
      • 1...Kf6
        • 2.exf8Q#
      • 1...Rxf3
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Rf6
        • 2.Sd3#
      • 1...d5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::QAB1(A),XP(g)
    • Q(j);N_GUARD,XR(I)::QAB1(A),XP(g)
    • Q(j);N_GUARD,XB(J)::QAB1(A),XP(g)
    • P(c);N_GUARD::QAB1(A)
    • P(g);SBLOCK::S(B)
  • Tries
    • Try
      • P(G);CHECK,XR(i)
      • Vars
        • Q(j);P_SPINQ(j)::QAB1(A),XP(g)
        • Q(j);XR(I)::QAB1(A),XP(g)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • P(G);
    • Threat
      • QAB1(A),XP(g)
    • Vars
      • K(d);S_FLIGHT::QAB(A),XP(g)
      • K(d);P-FLIGHT,P_SPINP(g),P_SPINR(i)::PXQ(j)=S
      • K(d);P_SPINP(g),S_FLIGHT::PXQ(j)=Q
      • R(i);N_GUARD,XP(D)::PXQ(j)=Q
      • R(i);SBLOCK::S(B)
      • P(g);SBLOCK::S(B)
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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).