MESON Chess Problem Database

Problem Display
PID: 269952 (3R1BB1/2P3P1/2pqN2K/p5N1/P1k2P2/1r2b3/1R1Pp3/1Q6 w - - 0 1)

Chicco, Adriano

Skakbladet, 1931

3R1BB1/2P3P1/2pqN2K/p5N1/P1k2P2/1r2b3/1R1Pp3/1Q6

#2

13 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe4#
    • 1...Qa3
      • 2.Sd4#
    • 1...Qb4
      • 2.Sd4#
      • 2.Sc5#
    • 1...Qxf4
      • 2.Sxf4#
    • 1...Qxc7
      • 2.Sxc7#
    • 1...Qd3
      • 2.Sd4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qxe6+
      • 2.Bxe6#
  • Tries
    • 1.Qc2+?
      • 1...Kb4
        • 2.Qxb3#
      • 1...Kd5
        • 2.Rxd6#
        • 2.Qxb3#
        • 2.Qe4#
      • 1...Rc3!
    • 1.Qe4+?
      • 1...Qd4
        • 2.Sxd4#
      • 1...Bd4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qxb3#
      • 1...Qxe6+
        • 2.Bxe6#
      • 1...Kd3
        • 2.Qxb3#
      • 1...Kb4
        • 2.Qxb3#
      • 1...Kd5
        • 2.Qxb3#
      • 1...Qa3
        • 2.Rc2#
      • 1...Qb4
        • 2.Sc5#
      • 1...Qd3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(d);P_SPINQ(g),S_CUTB(c),S_FLIGHT::QAB1(A)
    • Q(g);N_PINS(G)::B(M)+S(G)
    • Q(g);N_PINS(G),P_PINS(F),XP(E)::B(M)+S(G),XQ(g)
    • Q(g);N_PINS(G),XP(I)::B(M)+S(G),XQ(g)
    • Q(g);N_PINS(G)::B(M)+S(G),XQ(g)
    • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::B(M),XQ(g)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINQ(g),P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(g);N_PINS(G),P_SPINQ(g)::B(M)+S(G),XQ(g)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • Q(A);P_PINR(b)
    • Threat
      • QAB1(A),XR(b)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::B(M),XQ(g)
      • K(d);N_SPINR(b),P_SPINQ(g),S_FLIGHT::QAR2(A),XR(b)
      • K(d);P-FLIGHT,P_SPINQ(g)::QAR1(A),XR(b)
      • K(d);P_SPINQ(g),S_FLIGHT::QAB(A),XR(b)
      • Q(g);N_PINS(G)::R(B)
      • Q(g);N_PINS(G),SBLOCK::B(M)+S(G)
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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).