MESON Chess Problem Database

Problem Display
PID: 234939 (1B6/8/r4p2/1NRNp1n1/3Pk1P1/2r1p3/2P1K3/1B2R3 w - - 0 1)

Hoffmann, Fritz

Freie Presse, 1971

1B6/8/r4p2/1NRNp1n1/3Pk1P1/2r1p3/2P1K3/1B2R3

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Rca3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Rc4
      • 2.c3#
    • 1...Rxc5
      • 2.c4#
  • Tries
    • 1.Sxf6+?
      • 1...Kf4
        • 2.Bxe5#
      • 1...Rxf6!
    • 1.Bxe5?
      • threat
        • 2.Sbxc3#
        • 2.Sdxc3#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rxc5
        • 2.c4#
      • 1...Rca3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#
      • 1...Raa3
        • 2.Sd6#
        • 2.Sxf6#
      • 1...fxe5!
    • 1.Rf1?
      • threat
        • 2.Sdxc3#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rxc5
        • 2.c4#
      • 1...exd4
        • 2.Rf4#
      • 1...Rca3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#
      • 1...Raa3
        • 2.Sxf6#
      • 1...Sf3!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Sbxc3#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rxc5
        • 2.c4#
      • 1...exd4
        • 2.Rxd4#
      • 1...Rca3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rc4
        • 2.c3#
      • 1...Raa3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
    • R(a);OGATE::B(A)+P(C)
    • R(a);OGATE::B(A)+P(C),XR(a)
    • R(a);OGATE::P(C),XR(a)
    • R(a);OGATE,XR(H)::B(A)+P(C)
  • Tries
    • Try
      • S(I);CHECK,XP(g)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(d)::B(J),XP(d)
      • Refutation
        • R(f);XS(I)
    • Try
      • B(J);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
        • R(a);OGATE,XR(H)::B(A)+P(C)
        • R(a);OGATE::B(A)+P(C)
        • R(a);OGATE::B(A)+P(C),XR(a)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • P(g);XB(J)
    • Try
      • R(B);
      • Threat
        • S(I),XR(a)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
        • R(a);OGATE,XR(H)::B(A)+P(C)
        • P(d);N_GUARD,XP(E)::R1(B)
        • R(a);OGATE::B(A)+P(C)
        • R(a);OGATE::B(A)+P(C),XR(a)
        • R(a);OGATE::P(C),XR(a)
        • R(f);N_GUARD::S(I),XP(g)
      • Refutation
        • S(e);
  • Actual
    • R(B);
    • Threat
      • S(G),XR(a)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
      • R(a);OGATE,XR(H)::B(A)+P(C)
      • P(d);OGATE,XP(E)::R1(B),XP(d)
      • R(a);OGATE::B(A)+P(C)
      • R(a);OGATE::B(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(f);N_GUARD::S(G)
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).