MESON Chess Problem Database
Problem Display
PID: 35499 (5q1n/pPpr2Q1/K1k5/pp1N4/1P2N3/3R1B2/7B/6b1 w - - 0 1)
Macleod, Norman Alasdair
Die Schwalbe, 1952
#2
9 + 9
| 3105 | FIDE Album (1945-1955) | 1964 |
| 6455 | The Chessboard Adventures of Norman Macleod | 1996 |
SOLUTION
- SOUND
- Sets
- 1...Qxb4
- 2.b8S#
- 1...Qc5
- 2.b8S#
- 1...Qd6
- 2.b8S#
- 1...Qe7
- 2.b8S#
- 1...Qxg7
- 2.b8S#
- 1...Qxf3
- 2.b8S#
- 1...Qf4
- 2.b8S#
- 1...Qf5
- 2.b8S#
- 1...Qf6
- 2.b8S#
- 1...Qf7
- 2.b8S#
- 1...Qa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxd5
- 2.Qxc7#
- 1...Rd6
- 2.Qxc7#
- 1...Rd8
- 2.Qxc7#
- 1...Qxb4
- Tries
- 1.Sc5?
- threat
- 2.Se7#
- 2.Qxd7#
- 1...Qxc5
- 2.Se7#
- 2.b8S#
- 1...Qxg7
- 2.Se7#
- 2.b8S#
- 1...Qxf3
- 2.Qxd7#
- 2.b8S#
- 1...Rxd5
- 2.Bxd5#
- 2.Qxc7#
- 2.Qd7#
- 1...Rxg7
- 2.Sf4#
- 2.Sf6#
- 2.Se7#
- 1...Bxc5
- 2.Se7#
- 1...Qd6
- 2.Se7#
- 2.b8S#
- 1...Qe7
- 2.Sxe7#
- 2.b8S#
- 1...Qf5
- 2.Se7#
- 2.b8S#
- 1...Qf7
- 2.Se7#
- 2.b8S#
- 1...Qc8
- 2.Se7#
- 1...Qd8
- 2.Se7#
- 1...Qe8
- 2.Se7#
- 1...Rd6
- 2.Se7#
- 2.Qxc7#
- 1...Re7
- 2.Sxe7#
- 1...Rf7
- 2.Sf4#
- 2.Sf6#
- 2.Se7#
- 1...Rd8
- 2.Se7#
- 2.Qxc7#
- 1...Sf7
- 2.Se7#
- 1...axb4!
- threat
- 1.Se7+?
- 1...Qxe7
- 2.b8S#
- 1...Rxe7!
- 1...Qxe7
- 1.Qc3+?
- 1...Qc5
- 2.b8S#
- 1...Bc5!
- 1...Qc5
- 1.Qf6+?
- 1...Qd6
- 2.b8S#
- 1...Qxf6
- 2.b8S#
- 1...Rd6!
- 1...Qd6
- 1.Qxf8?
- threat
- 2.b8S#
- 1...Rd8
- 2.Se7#
- 1...Bd4!
- threat
- 1.Sc5?
- Keys
- 1.Se3!
- threat
- 2.Qxd7#
- 1...Qxg7
- 2.Sd6#
- 2.b8S#
- 1...Rxd3
- 2.Qxc7#
- 1...Rxg7
- 2.Sf6#
- 1...Qd6
- 2.Sxd6#
- 2.b8S#
- 1...Qe7
- 2.b8S#
- 1...Qf5
- 2.b8S#
- 1...Qf7
- 2.b8S#
- 1...Qc8
- 2.Sd6#
- 2.Rc3#
- 2.Qc3#
- 1...Qd8
- 2.Sd6#
- 2.Rc3#
- 2.Qc3#
- 1...Qe8
- 2.Rc3#
- 2.Qc3#
- 1...Rd4
- 2.Qxc7#
- 1...Rd5
- 2.Qxc7#
- 1...Rd6
- 2.Rc3#
- 1...Re7
- 2.Qc3#
- 1...Rf7
- 2.Sf6#
- 1...Rd8
- 2.Qxc7#
- 1...Sf7
- 2.Sd6#
- threat
- 1.Se3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 7
- Sets
- Q(h);N_GUARD,XP(D)::P=S
- Q(h);N_GUARD::P=S
- Q(h);N_GUARD,XQ(I)::P=S
- Q(h);N_GUARD,XB(C)::P=S
- Q(h);OGATE::PXQ(h)=Q
- R(g);OGATE,XS(F)::QAR1(I),XP(f)
- R(g);OGATE::QAR1(I),XP(f)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(a);XS(E)::B(C)+S(F),DCHECK
- Q(h);P_PINP(H)::B(C)+S(F),DCHECK
- Q(h);::B(C)+S(F),DCHECK
- R(g);::B(C)+S(F),DCHECK,XR(g)
- S(i);::B(C)+S(F),DCHECK
- Refutation
- P(b);XP(D)
- Try
- S(F);CHECK
- Vars
- Q(h);N_GUARD,S_CUTR(g),XS(F)::P=S
- Refutation
- R(g);XS(F)
- Try
- Q(I);CHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h),S_CUTB(a)::P=S
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(I);CHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h),S_CUTR(g)::P=S
- Q(h);N_GUARD,S_CUTR(g),XQ(I)::P=S
- Refutation
- R(g);P_SPINR(g)
- Try
- Q(I);XQ(h)
- Threat
- P=S
- Vars
- R(g);N_GUARD::S(F)
- Refutation
- B(a);
- Try
- Actual
- S(F);
- Threat
- QAB1(I),XR(g)
- Vars
- R(g);OGATE,XR(B)::QAR1(I),XP(f)
- R(g);N_GUARD,XQ(I)::B(C)+S(E)
- Q(h);N_GUARD::P=S
- R(g);OGATE::QAR1(I),XP(f)
- R(g);S_CUTQ(h)::R(B)
- R(g);S_CUTQ(h)::QAR(I)
- R(g);N_GUARD::B(C)+S(E)
- S(i);S_CUTQ(h)::B(C)+S(E)
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).