MESON Chess Problem Database

Problem Display
PID: 201394 (7b/1NNp4/1ppP4/6Q1/1p1kp1P1/1P6/r1p1P2p/1bB4K w - - 0 1)

Corrias, Antonio G

L'Alfiere di Re, 1922

7b/1NNp4/1ppP4/6Q1/1p1kp1P1/1P6/r1p1P2p/1bB4K

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qe3#
    • 1...Ra1
      • 2.Bb2#
    • 1...Rb2
      • 2.Bxb2#
    • 1...Ra3
      • 2.Bb2#
    • 1...Ra4
      • 2.Bb2#
    • 1...Ra5
      • 2.Bb2#
    • 1...Ra6
      • 2.Bb2#
    • 1...Ra7
      • 2.Bb2#
    • 1...Ra8
      • 2.Bb2#
    • 1...Be5
      • 2.Qd2#
      • 2.Qe3#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bg7
      • 2.Qxg7#
    • 1...e3
      • 2.Qxe3#
    • 1...b5
      • 2.Qc5#
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Kxh2?
      • 1...Kc3
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
      • 1...Ra1
        • 2.Bb2#
      • 1...Rb2
        • 2.Bxb2#
      • 1...Ra3
        • 2.Bb2#
      • 1...Ra4
        • 2.Bb2#
      • 1...Ra5
        • 2.Bb2#
      • 1...Ra6
        • 2.Bb2#
      • 1...Ra7
        • 2.Bb2#
      • 1...Ra8
        • 2.Bb2#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qxg7#
      • 1...b5
        • 2.Qc5#
      • 1...c5
        • 2.Sb5#
      • 1...Be5+!
    • 1.Se6+?
      • 1...Kc3
        • 2.Qe3#
      • 1...dxe6!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qc4#
      • 1...cxd5!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxh8#
      • 1...Kc3
        • 2.Qe3#
      • 1...Ke5
        • 2.Qxh8#
      • 1...e3
        • 2.Qxe3#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Ra5
        • 2.Bb2#
      • 1...Ra8
        • 2.Bb2#
      • 1...Be5
        • 2.Qd2#
        • 2.Qe3#
      • 1...Bg7
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • K(f);S_FLIGHT::QAR2(F)
    • R(b);N_GUARD::B(A)
    • R(b);N_GUARD::B(A),XR(b)
    • B(k);N_GUARD::QAB(F),XB(k)
    • P(g);::QAB1(F),XP(g)
    • P(h);N_GUARD::QAB1(F)
    • P(i);N_GUARD::S(I)
  • Tries
    • Try
      • K(B);P-FLIGHT,XP(d)
      • Vars
        • K(f);S_FLIGHT::QAR2(F)
        • P(g);::QAB1(F),XP(g)
        • R(b);N_GUARD::B(A)
        • R(b);N_GUARD::B(A),XR(b)
        • B(k);N_GUARD::QAB(F),XB(k)
        • P(h);N_GUARD::QAB1(F)
        • P(i);N_GUARD::S(I)
      • Refutation
        • B(k);CHECK
    • Try
      • S(I);CHECK
      • Vars
        • K(f);S_FLIGHT::QAR2(F)
      • Refutation
        • P(j);XS(I)
    • Try
      • Q(F);CHECK
      • Vars
        • K(f);S_FLIGHT::QAR1(F)
      • Refutation
        • P(i);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XB(k)
    • Vars
      • K(f);S_FLIGHT::QAR2(F)
      • K(f);S_FLIGHT::QAB(F),XB(k)
      • P(g);::QAB1(F),XP(g)
      • B(k);N_GUARD::QAB(F),XB(k)
      • R(b);N_GUARD::B(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).