MESON Chess Problem Database

Problem Display
PID: 269232 (8/8/8/3p4/3PpQN1/3pP2p/3K1pkp/5RbR w - - 0 1)

Chicco, Adriano

El Ajedrez Espanol, 1934

8/8/8/3p4/3PpQN1/3pP2p/3K1pkp/5RbR

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf1
      • 2.Qxf2#
    • 1...Kxh1
      • 2.Qxh2#
  • Tries
    • 1.Kc1?
      • 1...Kxf1
        • 2.Qxf2#
      • 1...Kxh1
        • 2.Qxh2#
      • 1...d2+!
    • 1.Kd1?
      • 1...Kxf1
        • 2.Qxf2#
      • 1...Kxh1
        • 2.Qxh2#
      • 1...d2!
    • 1.Kc3?
      • 1...Kxf1
        • 2.Qxf2#
      • 1...Kxh1
        • 2.Qxh2#
      • 1...d2!
    • 1.Sxf2?
      • 1...Bxf2
        • 2.Qxf2#
      • 1...Kxf1!
    • 1.Sxh2?
      • 1...Bxh2
        • 2.Qxf2#
      • 1...Kxh1!
    • 1.Rxh2+?
      • 1...Bxh2
        • 2.Qxf2#
      • 1...Kxf1!
    • 1.Qxh2+?
      • 1...Kxf1
        • 2.Qxf2#
        • 2.Qxh3#
      • 1...Kf3
        • 2.Se5#
        • 2.Qxh3#
      • 1...Bxh2!
    • 1.Qg3+?
      • 1...Kxf1
        • 2.Sxh2#
        • 2.Qxf2#
        • 2.Qxh3#
      • 1...Kxh1
        • 2.Sxf2#
        • 2.Qxh2#
      • 1...Kxg3!
    • 1.Qxf2+?
      • 1...Kxh1
        • 2.Qxh2#
      • 1...Bxf2!
  • Keys
    • 1.Qg5!
      • 1...Kxf1
        • 2.Sxh2#
      • 1...Kxh1
        • 2.Sxf2#
      • 1...Kf3
        • 2.Se5#
      • 1...Kg3
        • 2.Sxh2#
        • 2.Se5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,P_SPINB(a),P_SPINP(b),S_FLIGHT,XR(A)::QAR1(F),XP(b)
    • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(B)::QAR1(F),XP(d)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(c);N_GUARD,P_SPINB(a),P_SPINP(b),S_FLIGHT,XR(A)::QAR1(F),XP(b)
        • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(B)::QAR1(F),XP(d)
      • Refutation
        • P(e);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(c);N_GUARD,P_SPINB(a),P_SPINP(b),S_FLIGHT,XR(A)::QAR1(F),XP(b)
        • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(B)::QAR1(F),XP(d)
      • Refutation
        • P(e);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(c);N_GUARD,P_SPINB(a),P_SPINP(b),S_FLIGHT,XR(A)::QAR1(F),XP(b)
        • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(B)::QAR1(F),XP(d)
      • Refutation
        • P(e);
    • Try
      • S(G);XP(b)
      • Vars
        • B(a);OGATE,XS(G)::QAR1(F),XB(a)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT,XR(A)
    • Try
      • S(G);XP(d)
      • Vars
        • B(a);N_GUARD,XS(G)::QAR1(F),XP(b)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK,XP(d)
      • Vars
        • B(a);XR(B)::QAR1(F),XP(b)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT,XR(A)
    • Try
      • Q(F);CHECK,XP(d)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK,XP(b)
      • Vars
        • K(c);OGATE,P_SPINB(a),S_FLIGHT,XR(B)::QAR1(F),XP(d)
      • Refutation
        • B(a);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(A)::S(G),XP(d)
      • K(c);N_GUARD,P_SPINB(a),S_FLIGHT,XR(B)::S(G),XP(b)
      • K(c);N_GUARD,P_SPINP(b),S_FLIGHT::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).