MESON Chess Problem Database

Problem Display
PID: 206287 (8/pN2p2K/2npP3/1p1p4/Npk2nR1/2b1Q3/2P2p2/5b1B w - - 0 1)

Hertmann, Sandor

L'Alfiere di Re, 1925

8/pN2p2K/2npP3/1p1p4/Npk2nR1/2b1Q3/2P2p2/5b1B

#2

8 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3+
      • 2.Qxd3#
    • 1...Bh3
      • 2.Qd3#
    • 1...Be1
      • 2.Sb2#
    • 1...Bb2
      • 2.Sxb2#
    • 1...Bd2
      • 2.Sb2#
    • 1...Bd4
      • 2.Qb3#
    • 1...Sd4
      • 2.Sa5#
    • 1...Sa5
      • 2.Sxa5#
    • 1...Se5
      • 2.Sa5#
    • 1...Sb8
      • 2.Sa5#
    • 1...Sd8
      • 2.Sa5#
    • 1...b3
      • 2.Qxc3#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Rxf4+?
      • 1...Bd4
        • 2.Sb2#
        • 2.Qb3#
      • 1...Sd4
        • 2.Sa5#
      • 1...d4!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Rxf4#
      • 1...Bxe2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxd5#
      • 1...Bd3+
        • 2.Qxd3#
      • 1...Kd4
        • 2.Qxf4#
      • 1...b3
        • 2.Qxc3#
      • 1...Bg2
        • 2.Qd3#
      • 1...Bd4
        • 2.Qb3#
      • 1...Sd4
        • 2.Sa5#
      • 1...d4
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • B(a);N_GUARD::QAB1(C)
    • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
    • B(c);N_GUARD::S(D)
    • B(c);N_GUARD::S(D),XB(c)
    • B(c);N_SPINS(f),OGATE,SBLOCK::QAB1(C)
    • S(i);N_GUARD,N_SPINS(f)::S(G)
    • S(i);N_GUARD::S(G),XS(i)
    • S(i);N_GUARD::S(G)
    • P(d);N_GUARD::QAR1(C),XB(c)
    • P(k);N_GUARD::S(D)
  • Tries
    • Try
      • R(E);CHECK,XS(f)
      • Vars
        • S(i);P_SPINS(i)::S(G)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);P-FLIGHT::R(E),XS(f)
      • Refutation
        • B(a);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(h)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
      • K(e);P-FLIGHT::QAR2(C),XS(f)
      • P(d);N_GUARD::QAR1(C),XB(c)
      • B(a);N_GUARD::QAB1(C)
      • B(c);N_SPINS(f),OGATE,SBLOCK::QAB1(C)
      • S(i);N_GUARD,N_SPINS(f),SBLOCK::S(G)
      • P(h);N_SPINS(f),OGATE,SBLOCK::QAR2(C),XS(i)
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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).