MESON Chess Problem Database

Problem Display
PID: 234030 (3NR1K1/3n4/5b2/3k1N2/1Q1B2p1/nb1p2r1/8/1r6 w - - 0 1)

Palkoska, Emil

Il Due Mosse, 1952

3NR1K1/3n4/5b2/3k1N2/1Q1B2p1/nb1p2r1/8/1r6

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Se3#
    • 1...Rg2
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...Bc4
      • 2.Qd6#
    • 1...Bxd4
      • 2.Qxd4#
    • 1...Sc4
      • 2.Qb7#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sf8
      • 2.Qc5#
  • Tries
    • 1.Bf2?
      • threat
        • 2.Qe4#
      • 1...Be7
        • 2.Qd4#
      • 1...Re3
        • 2.Sxe3#
      • 1...Bc4
        • 2.Qd6#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Se7#
      • 1...Sc4
        • 2.Qb7#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qd4#
      • 1...Re1!
    • 1.Qb5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxb5!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qe4#
      • 1...Rxe3
        • 2.Sxe3#
      • 1...Be7
        • 2.Qd4#
      • 1...Bc4
        • 2.Qd6#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Se7#
      • 1...Sc4
        • 2.Qb7#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(e);N_GUARD::S(C)
    • R(e);N_GUARD::S(C),XR(e)
    • B(c);SBLOCK::QAR1(A)
    • B(h);OGATE,XB(B)::QAR1(A),XB(h)
    • S(b);SBLOCK::QAB(A)
    • S(i);N_GUARD::QAR1(A),XS(i)
    • S(i);N_GUARD::QAR1(A)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • B(h);N_GUARD::QAR1(A)
        • R(e);N_GUARD::S(C),XR(e)
        • B(c);SBLOCK::QAR1(A)
        • B(h);N_GUARD::QAR1(A),XB(h)
        • B(h);N_GUARD,SBLOCK::S(C)
        • S(b);SBLOCK::QAB(A)
        • S(i);N_GUARD::QAR1(A),XS(i)
        • S(i);S_CUTB(h)::QAR1(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(A),XS(i)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • B(B);
    • Threat
      • QAB1(A)
    • Vars
      • R(e);XB(B)::S(C),XR(e)
      • B(h);N_GUARD::QAR1(A)
      • B(c);SBLOCK::QAR1(A)
      • B(h);N_GUARD::QAR1(A),XB(h)
      • B(h);N_GUARD,SBLOCK::S(C)
      • S(b);SBLOCK::QAB(A)
      • S(i);N_GUARD::QAR1(A),XS(i)
      • S(i);S_CUTB(h)::QAR1(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).