MESON Chess Problem Database
Problem Display
PID: 81677 (8/1pQKp3/bPN2p2/Rq1k1p2/1P1b1P2/3P4/8/3N4 w - - 0 1)
Macleod, Norman Alasdair
3rd Comm., The Problemist, 1985/II
#2
9 + 8
| 6455 | The Chessboard Adventures of Norman Macleod | 1996 |
SOLUTION
- SOUND
- Sets
- 1...Qxa5
- 2.Sxe7#
- 1...Qc5
- 2.Sxe7#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 2.Se3#
- 1...Be3
- 2.Sc3#
- 2.Sxe3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...Bxb6
- 2.Sc3#
- 1...bxc6
- 2.Qxc6#
- 1...e5
- 2.Qd6#
- 1...e6
- 2.Qd6#
- 1...Qxa5
- Tries
- 1.Kxe7?
- threat
- 2.Qd6#
- 2.Qd7#
- 1...Qc5+
- 2.Qd6#
- 1...Be5
- 2.Se3#
- 1...Bc5+!
- threat
- 1.Rxb5+?
- 1...Bc5
- 2.Sc3#
- 2.Se3#
- 2.Rxc5#
- 1...Bxb5!
- 1...Bc5
- 1.Qe5+?
- 1...Bxe5
- 2.Se3#
- 1...fxe5!
- 1...Bxe5
- 1.Qb8?
- 1...Qxa5
- 2.Sxe7#
- 1...Bxb6
- 2.Sc3#
- 1...Qc5
- 2.Sxe7#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 2.Se3#
- 1...Be3
- 2.Sc3#
- 2.Sxe3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...e5
- 2.Qd6#
- 2.Qg8#
- 1...e6
- 2.Qd6#
- 1...bxc6!
- 1...Qxa5
- 1.Qc8?
- 1...Qxa5
- 2.Sxe7#
- 1...Bxb6
- 2.Sc3#
- 1...bxc6
- 2.Qxc6#
- 1...Qc5
- 2.Sxe7#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 2.Se3#
- 1...Be3
- 2.Sc3#
- 2.Sxe3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...e5
- 2.Qg8#
- 1...e6!
- 1...Qxa5
- 1.Kxe7?
- Keys
- 1.Qd8!
- 1...Qxa5
- 2.Sxe7#
- 1...Bxb6
- 2.Sc3#
- 1...bxc6
- 2.Kxe7#
- 1...Qc5
- 2.Sxe7#
- 1...Ba1
- 2.Se3#
- 1...Bg1
- 2.Sc3#
- 1...Bb2
- 2.Se3#
- 1...Bf2
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 2.Se3#
- 1...Be3
- 2.Sc3#
- 2.Sxe3#
- 1...Bc5
- 2.Sc3#
- 1...Be5
- 2.Se3#
- 1...e5
- 2.Qg8#
- 1...e6
- 2.Kc7#
- 1...Qxa5
- 1.Qd8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(b);N_PINS(G),N_SPINQ(b),XR(E)::S(G),XP(h)
- Q(b);N_PINS(G)::S(G),XP(h)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_SPINQ(b)::S(A)
- B(a);N_GUARD,XP(F)::S(A)
- P(g);OGATE,XS(G)::QAB1(H),XP(g)
- P(h);N_GUARD::QAR1(H)
- Tries
- Try
- K(I);N_SPINS(G),P-FLIGHT,XP(h)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK::QAR1(H)
- B(a);N_GUARD::S(A)
- Refutation
- B(a);CHECK,N_SPINQ(b)
- Try
- R(E);CHECK,N_SPINS(G),XQ(b)
- Refutation
- B(e);P_PINS(G),XR(E)
- Try
- Q(H);CHECK
- Vars
- B(a);XQ(H)::S(A)
- Refutation
- P(f);XQ(H)
- Try
- Q(H);
- Vars
- Q(b);N_PINS(G),N_SPINQ(b),XR(E)::S(G),XP(h)
- B(a);N_GUARD,XP(F)::S(A)
- Q(b);N_PINS(G)::S(G),XP(h)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_SPINQ(b)::S(A)
- P(h);N_GUARD::QAR1(H)
- Refutation
- P(g);XS(G)
- Try
- Q(H);
- Vars
- Q(b);N_PINS(G),N_SPINQ(b),XR(E)::S(G),XP(h)
- B(a);N_GUARD,XP(F)::S(A)
- P(g);OGATE,XS(G)::QAB1(H),XP(g)
- Q(b);N_PINS(G)::S(G),XP(h)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_SPINQ(b)::S(A)
- P(h);N_GUARD::QAB(H)
- Refutation
- P(h);
- Try
- Actual
- Q(H);
- Vars
- Q(b);N_PINS(G),N_SPINQ(b),XR(E)::S(G),XP(h)
- B(a);N_GUARD,XP(F)::S(A)
- P(g);SBLOCK,XS(G)::QAR(H)+K(I),XP(h)
- Q(b);N_PINS(G)::S(G),XP(h)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_SPINQ(b)::S(A)
- P(h);N_GUARD::QAB(H)
- P(h);SBLOCK::QAR(H)+K(I)
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).