MESON Chess Problem Database
Problem Display
PID: 959 (6Q1/3B4/3B4/Kp1N1q1r/p1p1k3/3r1R2/2N1P3/8 w - - 0 1)
Lincoln, Robert A
The Problemist Supplement, 1994
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Qh3
- 2.Sf6#
- 2.Rf4#
- 1...Qg4
- 2.Sf6#
- 1...Qg6
- 2.Rf4#
- 1...Qxd7
- 2.Sf6#
- 2.Rf4#
- 1...Qh7
- 2.Sf6#
- 2.Rf4#
- 1...Qf4
- 2.Rxf4#
- 1...Qxd5
- 2.Rf4#
- 2.Qg4#
- 1...Qf6
- 2.Sxf6#
- 1...Rd1
- 2.Sc3#
- 2.Re3#
- 1...Rd2
- 2.Sc3#
- 2.Re3#
- 1...Rc3
- 2.Sxc3#
- 1...Re3
- 2.Rxe3#
- 1...Rd4
- 2.Sc3#
- 2.Re3#
- 1...Rxd5
- 2.Re3#
- 1...Rh1
- 2.Bxf5#
- 1...Rh2
- 2.Bxf5#
- 1...Rh3
- 2.Bxf5#
- 1...Rh4
- 2.Bxf5#
- 1...Rh6
- 2.Bxf5#
- 1...Rh7
- 2.Bxf5#
- 1...Rh8
- 2.Bxf5#
- 1...Qh3
- Tries
- 1.Rxf5?
- threat
- 2.Sf6#
- 2.Rf4#
- 2.Qe6#
- 2.Qg4#
- 2.Qe8#
- 1...Rxd5
- 2.Rf4#
- 2.Qxd5#
- 2.Qg2#
- 2.Qg4#
- 1...Rf3
- 2.Sf6#
- 2.Qe6#
- 2.Qe8#
- 1...Rg3
- 2.Sf6#
- 2.Rf4#
- 2.Qe6#
- 2.Qe8#
- 1...Rh4
- 2.Sf6#
- 2.Re5#
- 2.Qe6#
- 2.Qe8#
- 1...Rg5
- 2.Sf6#
- 2.Rf4#
- 2.Qe6#
- 2.Qe8#
- 1...Rh6
- 2.Rf4#
- 2.Re5#
- 2.Qg4#
- 1...Rh7
- 2.Sf6#
- 2.Rf4#
- 2.Re5#
- 2.Qe6#
- 2.Qg4#
- 1...Rh8
- 2.Sf6#
- 2.Rf4#
- 2.Re5#
- 2.Qe6#
- 2.Qg4#
- 1...Rxf5!
- threat
- 1.Qe6+?
- 1...Qe5
- 2.Sf6#
- 2.Rf4#
- 1...Qxe6!
- 1...Qe5
- 1.Qg4+?
- 1...Qxg4
- 2.Sf6#
- 1...Qf4
- 2.Sf6#
- 1...Kxd5!
- 1...Qxg4
- 1.Qa8?
- threat
- 2.Sc3#
- 2.Sf6#
- 1...Qxd5
- 2.Rf4#
- 1...Rxd5
- 2.Re3#
- 1...Qf6
- 2.Sc3#
- 2.Sxf6#
- 1...Rc3
- 2.Sxc3#
- 2.Sf6#
- 1...c3
- 2.Sxc3#
- 2.Sf6#
- 1...b4!
- threat
- 1.Qe8+?
- 1...Qe6
- 2.Sf6#
- 1...Qe5
- 2.Sf6#
- 1...Kxd5!
- 1...Qe6
- 1.exd3+?
- 1...cxd3
- 2.Re3#
- 1...Kxf3!
- 1...cxd3
- 1.Rxf5?
- Keys
- 1.Qg2!
- threat
- 2.Re3#
- 2.Rf4#
- 1...Kxd5
- 2.Rxd3#
- 1...Qxd7
- 2.Sf6#
- 2.Rf4#
- 1...Qxf3
- 2.Sf6#
- 1...Rxf3
- 2.Sc3#
- 1...Qe6
- 2.Rf4#
- 1...Qf4
- 2.Re3#
- 2.Rxf4#
- 1...Re3
- 2.Rxe3#
- 2.Rf4#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 14
- Sets
- Q(f);N_GUARD::S(E)
- Q(f);N_GUARD::R1(C)
- Q(f);N_GUARD::R1(C),XQ(f)
- Q(f);N_GUARD::S(E),XQ(f)
- R(a);N_GUARD::S(E),XR(a)
- R(a);N_GUARD::R1(C),XR(a)
- R(a);N_GUARD,XS(E)::R1(C)
- R(g);N_GUARD::B(G),XQ(f)
- Tries
- Try
- R(C);XQ(f)
- Threat
- DUALS(5)
- Refutation
- R(g);XR(C)
- Try
- Q(H);CHECK
- Refutation
- Q(f);XQ(H)
- Try
- Q(H);CHECK
- Vars
- Q(f);XQ(H)::S(E)
- Q(f);P_SPINQ(f)::S(E)
- Refutation
- K(d);S_FLIGHT,XS(E)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_SPINQ(f),XS(E)::R1(C)
- R(a);N_GUARD,P_SPINR(a),XS(E)::R1(C)
- Refutation
- P(e);P_PINS(E)
- Try
- Q(H);CHECK
- Vars
- Q(f);P_SPINQ(f)::S(E)
- Refutation
- K(d);S_FLIGHT,XS(E)
- Try
- P(B);CHECK,XR(a)
- Vars
- P(c);XP(B)::R1(C)
- Refutation
- K(d);S_FLIGHT,XR(C)
- Try
- Actual
- Q(H);
- Threat
- DUALS(2)
- Vars
- K(d);S_FLIGHT,XS(E)::QAB(H)+R(C),DCHECK,XR(a)
- Q(f);N_GUARD,P_SPINQ(f),XR(C)::S(E)
- R(a);N_GUARD,P_SPINR(a),XR(C)::S(E)
- Q(f);::QAB(H)+R(C),DCHECK
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).