MESON Chess Problem Database

Problem Display
PID: 231392 (7B/1P2Np1B/K1Q1br2/p6r/3k1P1b/1pR1pPn1/8/4n3 w - - 0 1)

Cristoffanini, Guido

Comm., Magyar Sakkvilag, 1927

7B/1P2Np1B/K1Q1br2/p6r/3k1P1b/1pR1pPn1/8/4n3

#2

9 + 11

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rd5
      • 2.Rc4#
      • 2.Qc4#
    • 1...Rh6
      • 2.Qc5#
    • 1...Rxh7
      • 2.Qc5#
    • 1...Bg5
      • 2.Qc5#
    • 1...Bh3
      • 2.Rc4#
    • 1...Bc4+
      • 2.Rxc4#
    • 1...Bg4
      • 2.Rc4#
    • 1...Bd7
      • 2.Rc4#
    • 1...Bc8
      • 2.Rc4#
    • 1...Sc2
      • 2.Rd3#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sxf3
      • 2.Rd3#
    • 1...Sf5
      • 2.Qc5#
  • Tries
    • 1.Bxf6+?
      • 1...Re5
        • 2.Bxe5#
        • 2.Qc5#
      • 1...Bxf6!
    • 1.Qb6+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Kxc3!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Qc3#
      • 1...Bc4+
        • 2.Rxc4#
      • 1...Bf5
        • 2.Qd6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Bh3
        • 2.Rc4#
      • 1...Bg4
        • 2.Rc4#
      • 1...Bd5
        • 2.Qb6#
      • 1...Bd7
        • 2.Rc4#
      • 1...Bc8
        • 2.Rc4#
      • 1...Sc2
        • 2.Rd1#
      • 1...Se2
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::QAB1(E),XR(h)
    • R(h);N_GUARD::QAB1(E)
    • R(h);N_GUARD,XB(H)::QAB1(E)
    • B(f);S_CUTR(h)::QAB1(E)
    • B(i);N_GUARD,P_PINQ(E)::R1(A)
    • B(i);CHECK,N_GUARD,P_PINQ(E)::R1(A),XB(i)
    • B(i);N_GUARD,P_PINP(F),P_PINQ(E)::R1(A)
    • S(a);N_GUARD::R1(A)
    • S(a);N_GUARD::R1(A),XS(a)
    • S(a);N_GUARD,XP(B)::R1(A)
    • S(d);S_CUTR(h)::QAB1(E)
  • Tries
    • Try
      • B(I);CHECK,XR(j)
      • Refutation
        • B(f);XB(I)
    • Try
      • Q(E);CHECK
      • Vars
        • R(h);N_GUARD,N_SPINR(j),P_SPINR(h)::QAB1(E),XR(h)
      • Refutation
        • K(e);S_FLIGHT,XR(A)
  • Actual
    • R(A);
    • Threat
      • QAB1(E)
    • Vars
      • B(i);CHECK,N_GUARD,P_PINQ(E)::R1(A),XB(i)
      • B(i);N_GUARD,P_PINQ(E),S_CUTR(h)::QAR2(E)
      • S(d);N_GUARD::QAR1(E),XS(d)
      • R(h);N_GUARD::QAB1(E),XR(h)
      • B(i);N_GUARD,P_PINQ(E)::R1(A)
      • B(i);P_PINQ(E),S_CUTR(h)::QAB(E)
      • B(i);N_GUARD,P_PINP(F),P_PINQ(E)::R1(A)
      • S(a);N_GUARD::R(A)
      • S(d);N_GUARD::QAR1(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).