MESON Chess Problem Database

Problem Display
PID: 229116 (b2b4/6Np/K3N2r/p6P/3Bk3/1Q1RP1R1/5rp1/1B3qn1 w - - 0 1)

Simkhovich, Froim Markovich

2nd Prize, Shakhmaty, 1926

b2b4/6Np/K3N2r/p6P/3Bk3/1Q1RP1R1/5rp1/1B3qn1

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Bxd3#
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Bc6
      • 2.Sc5#
    • 1...Bb7+
      • 2.Qxb7#
    • 1...Bb6
      • 2.Sg5#
    • 1...Bf6
      • 2.Sc5#
    • 1...Se2
      • 2.Rd1#
    • 1...Sf3
      • 2.Rg4#
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qa4#
        • 2.Qc4#
      • 1...Qxd3+
        • 2.Qc4#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Qxb1
        • 2.Qc4#
      • 1...Rc2
        • 2.Qc4#
      • 1...Qd1
        • 2.Qc4#
      • 1...Ra2
        • 2.Qc4#
      • 1...Rb2
        • 2.Qc4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bc6
        • 2.Sc5#
        • 2.Qc4#
      • 1...Bb6
        • 2.Sg5#
      • 1...Bf6
        • 2.Sc5#
      • 1...Be7
        • 2.Qc4#
      • 1...Se2
        • 2.Rd1#
      • 1...Sf3
        • 2.Rg4#
      • 1...a4
        • 2.Qxa4#
        • 2.Qc4#
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(A),XQ(a)
    • R(g);CHECK,OGATE,XS(I)::QAR2(B),XR(g)
    • B(i);N_PINS(I)::S(I)
    • B(i);CHECK,N_GUARD::QAB(B),XB(i)
    • B(j);N_PINS(I)::S(I)
    • S(b);N_PINR(C)::B(A)+R(C)
    • S(b);SBLOCK,S_CUTR(c)::R(E)
  • Actual
    • B(F);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);CHECK,P_SPINQ(a),XR(C)::QAR2(B)
      • R(g);CHECK,OGATE,XS(I)::QAR2(B),XR(g)
      • B(i);CHECK,N_GUARD::QAB(B),XB(i)
      • Q(a);N_PINR(C),XB(A)::QAR2(B)
      • R(c);::QAR2(B)
      • Q(a);N_PINR(C)::QAR2(B)
      • B(i);N_GUARD::QAB1(B),XB(i)
      • B(j);N_PINS(I)::S(I)
      • B(j);::QAR2(B)
      • S(b);N_PINR(C)::B(A)+R(C)
      • S(b);SBLOCK,S_CUTR(c)::R(E)
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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).