MESON Chess Problem Database

Problem Display
PID: 227522 (8/7n/b5pN/K1P1k1p1/2P5/2NPB2B/3q4/Q3R3 w - - 0 1)

Cristoffanini, Guido

Pittsburgh Post, 1926

8/7n/b5pN/K1P1k1p1/2P5/2NPB2B/3q4/Q3R3

#2

10 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Bd4#
    • 1...Qxc3+
      • 2.Qxc3#
    • 1...Qxe3
      • 2.Sd5#
    • 1...Qd1
      • 2.Sb1#
      • 2.Sxd1#
    • 1...Qa2+
      • 2.Sxa2#
    • 1...Qe2
      • 2.Sxe2#
    • 1...Qf2
      • 2.Se2#
    • 1...Qg2
      • 2.Se2#
    • 1...Qh2
      • 2.Se2#
    • 1...Sf6
      • 2.Sf7#
  • Tries
    • 1.Bxd2+?
      • 1...Kf6
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Sa4#
        • 2.Sb5#
        • 2.Sd5#
      • 1...Kd4!
    • 1.Bc8?
      • threat
        • 2.Sg4#
      • 1...Qxc3+
        • 2.Qxc3#
      • 1...Qa2+
        • 2.Sxa2#
      • 1...Kf6
        • 2.Bd4#
      • 1...Qxe3
        • 2.Sd5#
      • 1...Qd1
        • 2.Sb1#
        • 2.Sxd1#
      • 1...Qe2
        • 2.Sxe2#
      • 1...Qg2
        • 2.Se2#
      • 1...Sf6
        • 2.Sf7#
      • 1...g4
        • 2.Sxg4#
      • 1...Bxc8!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Sg4#
      • 1...Qxc3+
        • 2.Qxc3#
      • 1...Qa2+
        • 2.Sxa2#
      • 1...Kf6
        • 2.Bd4#
      • 1...Qxe3
        • 2.Sd5#
      • 1...Qd1
        • 2.Sb1#
        • 2.Sxd1#
      • 1...Qe2
        • 2.Sxe2#
      • 1...Qg2
        • 2.Se2#
      • 1...Sf6
        • 2.Sf7#
      • 1...g4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(b);S_FLIGHT::B(E)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::QAB(A),XQ(a)
    • Q(a);N_PINS(C),P_SPINQ(a),XB(E)::QAB(A)+S(C)
    • Q(a);CHECK,N_PINS(C)::QAB(A)+S(C),XQ(a)
    • Q(a);N_PINS(C)::QAB(A)+S(C),XQ(a)
    • Q(a);N_PINS(C)::QAB(A)+S(C)
    • S(f);SBLOCK::S(J)
  • Tries
    • Try
      • B(E);CHECK,N_SPINS(C),XQ(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(F);
      • Threat
        • S(J)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::QAB(A),XQ(a)
        • Q(a);CHECK,N_PINS(C)::QAB(A)+S(C),XQ(a)
        • K(b);S_FLIGHT::B(E)
        • Q(a);N_PINS(C),P_SPINQ(a),XB(E)::QAB(A)+S(C)
        • Q(a);N_PINS(C)::QAB(A)+S(C),XQ(a)
        • Q(a);N_PINS(C)::QAB(A)+S(C)
        • S(f);SBLOCK::S(J)
        • P(c);::S(J),XP(c)
      • Refutation
        • B(d);XB(F)
  • Actual
    • B(F);
    • Threat
      • S(J)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::QAB(A),XQ(a)
      • Q(a);CHECK,N_PINS(C)::QAB(A)+S(C),XQ(a)
      • K(b);S_FLIGHT::B(E)
      • Q(a);N_PINS(C),P_SPINQ(a),XB(E)::QAB(A)+S(C)
      • Q(a);N_PINS(C)::QAB(A)+S(C),XQ(a)
      • Q(a);N_PINS(C)::QAB(A)+S(C)
      • S(f);SBLOCK::S(J)
      • P(c);::S(J),XP(c)
HTML5 logo

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).