MESON Chess Problem Database
Problem Display
PID: 138963 (n7/KB1Np3/3kP3/p1RN1P1b/5r2/B5qn/1R2p2Q/2r5 w - - 0 1)
Bottacchi, Antonio
Ajec, 1941
#2
10 + 10
| 3530 | Het Half Pin Thema (II) | 1947 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Rc3#
- 1...Qxh2
- 2.Rc4#
- 1...Qh4
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qg2
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qc3
- 2.Rxc3#
- 1...Qd3
- 2.Rc3#
- 1...Qf3
- 2.Rc3#
- 1...Qg4
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qg5
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qg6
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qg7
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Qg8
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Rxc5
- 2.Bxc5#
- 1...Rf1
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Rf2
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Rf3
- 2.Rc3#
- 1...Rc4
- 2.Rxc4#
- 1...Rd4
- 2.Rc4#
- 1...Re4
- 2.Rc4#
- 1...Rg4
- 2.Rc4#
- 1...Rh4
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Sb6
- 2.Rxb6#
- 1...Sc7
- 2.Rb6#
- 1...Qe1
- Tries
- 1.Sc3?
- threat
- 2.Sb5#
- 2.Rc4#
- 2.Rc6#
- 1...Qxc3
- 2.Rxc3#
- 1...Rxf5
- 2.Rc6#
- 1...Qf2
- 2.Se4#
- 2.Sb5#
- 1...Qg1
- 2.Se4#
- 2.Sb5#
- 1...Qd3
- 2.Rc4#
- 2.Rc6#
- 2.Rc8#
- 1...Qe3
- 2.Sb5#
- 1...Ra1
- 2.Sb5#
- 2.Rc6#
- 1...Ra4
- 2.Sb5#
- 2.Rc6#
- 1...Rb4
- 2.Rc6#
- 1...Rc4
- 2.Sb5#
- 2.Rxc4#
- 2.Rc6#
- 1...Sc7
- 2.Rb6#
- 2.Rc4#
- 2.Rd5#
- 2.Rc6#
- 1...Rxc3!
- threat
- 1.S5b6?
- threat
- 2.Sc8#
- 2.Rc6#
- 1...Qxa3
- 2.Sc8#
- 1...Rxf5
- 2.Rc6#
- 1...Sxb6
- 2.Rxb6#
- 1...Qg8
- 2.Rd2#
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rc6#
- 1...Rb4
- 2.Sc8#
- 1...Rxc5!
- threat
- 1.Sc7?
- threat
- 2.Sb5#
- 2.Rc6#
- 1...Qxa3
- 2.Sb5#
- 1...Rxc5
- 2.Sb5#
- 1...Rxf5
- 2.Rc6#
- 1...Sxc7
- 2.Rb6#
- 2.Rd5#
- 1...Qf2
- 2.Sb5#
- 1...Qg1
- 2.Sb5#
- 1...Qb3
- 2.Rc6#
- 1...Qd3
- 2.Rc3#
- 2.Rc6#
- 1...Qe3
- 2.Sb5#
- 1...Rb4!
- threat
- 1.Qxg3?
- threat
- 2.Rxc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 1...Rxc5
- 2.Bxc5#
- 1...e1Q
- 2.Rc3#
- 1...e1B
- 2.Rc3#
- 1...Rb1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Rd1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Re1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Rf1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Rg1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Rh1
- 2.Rc1#
- 2.Rcc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rcb5#
- 2.Rc7#
- 2.Rc8#
- 1...Rc2
- 2.Rcxc2#
- 2.Rc3#
- 2.Rc4#
- 1...Rc3
- 2.Rxc3#
- 1...Rc4
- 2.Rxc4#
- 1...Ra1!
- threat
- 1.Sc3?
- Keys
- 1.Rd2!
- threat
- 2.Rc6#
- 1...Qxa3
- 2.Sc3#
- 1...Rxc5
- 2.Bxc5#
- 1...Qf2
- 2.Se3#
- 1...Qg1
- 2.Se3#
- 1...Qd3
- 2.Rc3#
- 1...Qe3
- 2.Sxe3#
- 1...Rb4
- 2.Sxb4#
- 1...Rd4
- 2.Rc4#
- threat
- 1.Rd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 12
- Sets
- Q(c);P_SPINR(e)::B(C)+R(D)
- Q(c);N_GUARD,XQ(B)::B(C)+R(D)
- Q(c);P_SPINR(e)::B(C)+R(D),XQ(c)
- R(a);OGATE,P_SPINR(a),XR(D)::B(C),XR(a)
- R(e);N_GUARD,P_SPINQ(c)::B(C)+R(D)
- R(e);P_SPINQ(c)::B(C)+R(D),XR(e)
- R(e);P_SPINQ(c)::B(C)+R(D)
- B(g);S_CUTQ(c)::B(C)+R(D)
- S(j);N_GUARD::R(A),XS(j)
- S(j);N_GUARD::R(A)
- Tries
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- Q(c);OGATE,P_SPINR(e),XS(E)::B(C)+R(D),XQ(c)
- R(e);P_SPINQ(c),XP(F)::B(C)+R(D),DCHECK
- Q(c);P_PINR(D),P_SPINR(e)::S(E)
- R(e);P_SPINQ(c)::R1(D)
- Refutation
- R(a);XS(E)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(c);P_SPINR(e),XB(C)::S(E)
- R(e);P_SPINQ(c),XP(F)::B(C)+R(D),DCHECK
- S(j);OGATE,XS(E)::R(A),XS(j)
- R(e);P_SPINQ(c)::S(E)
- Refutation
- R(a);P_SPINR(a),XR(D)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(c);P_SPINR(e),XB(C)::S(E)
- R(a);P_SPINR(a),XR(D)::S(E)
- R(e);P_SPINQ(c),XP(F)::B(C)+R(D),DCHECK
- Q(c);P_PINR(D),P_SPINR(e)::S(E)
- Q(c);P_SPINR(e)::B(C)+R(D),DCHECK
- Refutation
- R(e);P_SPINQ(c)
- Try
- Q(B);P_PINR(e),XQ(c)
- Threat
- DUALS(4)
- Vars
- R(a);OGATE,XR(D)::B(C),XR(a)
- P(b);::B(C)+R(D)
- R(a);::B(C)+R(D),XR(a)
- Refutation
- R(a);
- Try
- Actual
- R(A);
- Threat
- B(C)+R(D),DCHECK
- Vars
- Q(c);N_GUARD,P_SPINR(e),XB(C)::R(A)+S(E)
- R(a);OGATE,P_SPINR(a),XR(D)::B(C),XR(a)
- Q(c);P_PINR(D),P_SPINR(e)::R(A)+S(E)
- Q(c);P_SPINR(e)::B(C)+R(D)
- Q(c);P_PINR(D),P_SPINR(e)::R(A)+S(E),XQ(c)
- R(e);N_GUARD,P_SPINQ(c)::R(A)+S(E),XR(e)
- R(e);P_SPINQ(c)::B(C)+R(D)
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).