MESON Chess Problem Database

Problem Display
PID: 202476 (8/p1np4/rb1N4/p1P2p2/R1PkpPb1/B3p2p/2p4P/2N1Q1K1 w - - 0 1)

Nanning, Willem

De Maasbode, 1923

8/p1np4/rb1N4/p1P2p2/R1PkpPb1/B3p2p/2p4P/2N1Q1K1

#2

10 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Sxf5#
    • 1...Be2
      • 2.Sxf5#
    • 1...Bf3
      • 2.Sxf5#
    • 1...Bh5
      • 2.Sxf5#
    • 1...Bxc5
      • 2.Bb2#
    • 1...Sb5
      • 2.Sxb5#
    • 1...Sd5
      • 2.Sb5#
    • 1...Se6
      • 2.Sb5#
    • 1...Sa8
      • 2.Sb5#
    • 1...Se8
      • 2.Sb5#
    • 1...e2
      • 2.Qd2#
  • Tries
    • 1.Kh1?
      • 1...Bxc5
        • 2.Bb2#
      • 1...e2
        • 2.Qd2#
      • 1...Bd1
        • 2.Sxf5#
      • 1...Be2
        • 2.Sxf5#
      • 1...Bh5
        • 2.Sxf5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...Bf3+!
    • 1.Qb4?
      • threat
        • 2.Bb2#
        • 2.Qb2#
      • 1...e2
        • 2.Qd2#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...axb4!
    • 1.c6?
      • 1...e2
        • 2.Qd2#
      • 1...Bd1
        • 2.Sxf5#
      • 1...Be2
        • 2.Sxf5#
      • 1...Bf3
        • 2.Sxf5#
      • 1...Bh5
        • 2.Sxf5#
      • 1...Bc5
        • 2.Bb2#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...dxc6!
  • Keys
    • 1.Qg3!
      • 1...Kc3
        • 2.Qxe3#
      • 1...Bxc5
        • 2.Bb2#
      • 1...Bd1
        • 2.Qg7#
      • 1...Be2
        • 2.Qg7#
      • 1...Bf3
        • 2.Qg7#
      • 1...Bh5
        • 2.Qg7#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...e2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::S(J),XP(h)
    • B(j);SBLOCK,XP(I)::B(E)
    • S(l);N_GUARD::S(J),XS(l)
    • S(l);N_GUARD::S(J)
    • P(b);N_GUARD::QAR2(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • B(j);SBLOCK,XP(I)::B(E)
        • P(b);N_GUARD::QAR2(B)
        • B(f);N_GUARD::S(J),XP(h)
        • S(l);N_GUARD::S(J),XS(l)
        • S(l);N_GUARD::S(J)
      • Refutation
        • B(f);CHECK
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);N_GUARD::QAR2(B)
        • S(l);N_GUARD::S(J),XS(l)
        • S(l);N_GUARD::S(J)
      • Refutation
        • P(g);XQ(B)
    • Try
      • P(I);
      • Vars
        • P(b);N_GUARD::QAR2(B)
        • B(f);N_GUARD::S(J),XP(h)
        • B(j);SBLOCK::B(E)
        • S(l);N_GUARD::S(J),XS(l)
        • S(l);N_GUARD::S(J)
      • Refutation
        • P(m);XP(I)
  • Actual
    • Q(B);
    • Vars
      • K(d);P_SPINP(b),S_FLIGHT::QAR2(B),XP(b)
      • B(j);SBLOCK,XP(I)::B(E)
      • B(f);OGATE::QAB(B)
      • S(l);N_GUARD::S(J),XS(l)
      • S(l);N_GUARD::S(J)
      • P(b);::S(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).