MESON Chess Problem Database
Problem Display
PID: 121900 (5B1q/K1pBN3/3Pp3/2k3n1/3R1rR1/2NPQ1n1/2b5/8 w - - 0 1)
van Dooren, Rene
The Problemist, 1987
#2
10 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Qxe5#
- 1...Qh2
- 2.Qe5#
- 1...Qh3
- 2.Qe5#
- 1...Qh4
- 2.Qe5#
- 1...Qh5
- 2.Qe5#
- 1...Qh6
- 2.Qe5#
- 1...Qh7
- 2.Qe5#
- 1...Qxf8
- 2.Qe5#
- 1...Qg8
- 2.Qe5#
- 1...Rf1
- 2.Rd5#
- 1...Rf2
- 2.Rd5#
- 1...Rf3
- 2.Rd5#
- 1...Rf5
- 2.Rd5#
- 1...Rf6
- 2.Rd5#
- 2.Qe5#
- 1...Rf7
- 2.Rd5#
- 1...Rxf8
- 2.Rd5#
- 1...Bb1
- 2.Sa4#
- 1...Bxd3
- 2.Sa4#
- 1...Ba4
- 2.Sxa4#
- 1...cxd6
- 2.Rc4#
- 1...Qe5
- Tries
- 1.Sf5?
- threat
- 2.Rc4#
- 1...Qxd4
- 2.dxc7#
- 1...Bxd3
- 2.Sa4#
- 1...Rxd4!
- threat
- 1.Sg8?
- threat
- 2.Rc4#
- 1...Rxd4
- 2.dxc7#
- 1...Rxf8
- 2.Rd5#
- 1...Bxd3
- 2.Sa4#
- 1...Qxd4!
- threat
- 1.Re4+?
- 1...Qd4
- 2.Qxd4#
- 1...Kxd6!
- 1...Qd4
- 1.Rdxf4+?
- 1...Qd4
- 2.Qxd4#
- 1...Kxd6!
- 1...Qd4
- 1.Qxf4?
- threat
- 2.Rc4#
- 1...Qxd4
- 2.Qxd4#
- 1...Bxd3
- 2.Sa4#
- 1...Qe5
- 2.Qxe5#
- 1...e5
- 2.Rd5#
- 1...Bb3!
- threat
- 1.Sf5?
- Keys
- 1.dxc7!
- threat
- 2.c8Q#
- 2.c8R#
- 1...Qxd4
- 2.Sf5#
- 1...Qxf8
- 2.Qe5#
- 1...Rxd4
- 2.Sg8#
- 1...Rxg4
- 2.Sg8#
- 2.c8Q#
- 2.c8R#
- 1...Rxf8
- 2.Rd5#
- 1...Bxd3
- 2.Sa4#
- 2.c8Q#
- 2.c8R#
- 1...Qe5
- 2.Qxe5#
- 1...Qf6
- 2.c8Q#
- 2.c8R#
- 1...Qg7
- 2.c8Q#
- 2.c8R#
- 1...Qh1
- 2.Sf5#
- 1...Qh2
- 2.Sf5#
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qh3
- 2.Sf5#
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qh4
- 2.Sf5#
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qh5
- 2.Sf5#
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qh6
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qh7
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Qg8
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Rf1
- 2.Rd5#
- 2.c8Q#
- 2.c8R#
- 1...Rf2
- 2.Rd5#
- 2.c8Q#
- 2.c8R#
- 1...Rf3
- 2.Rd5#
- 2.c8Q#
- 2.c8R#
- 1...Re4
- 2.Sg8#
- 2.c8Q#
- 2.c8R#
- 1...Rf5
- 2.Rd5#
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.Rd5#
- 2.Qe5#
- 2.c8Q#
- 2.c8R#
- 1...Rf7
- 2.Rd5#
- 2.c8Q#
- 2.c8R#
- 1...Bb1
- 2.Sa4#
- 2.c8Q#
- 2.c8R#
- 1...Bd1
- 2.c8Q#
- 2.c8R#
- 1...Bb3
- 2.c8Q#
- 2.c8R#
- 1...Ba4
- 2.Sxa4#
- 1...Sf1
- 2.c8Q#
- 2.c8R#
- 1...Sh1
- 2.c8Q#
- 2.c8R#
- 1...Se2
- 2.c8Q#
- 2.c8R#
- 1...S3e4
- 2.c8Q#
- 2.c8R#
- 1...Sf5
- 2.c8Q#
- 2.c8R#
- 1...Sh5
- 2.c8Q#
- 2.c8R#
- 1...Sf3
- 2.c8Q#
- 2.c8R#
- 1...Sh3
- 2.c8Q#
- 2.c8R#
- 1...S5e4
- 2.c8Q#
- 2.c8R#
- 1...Sf7
- 2.c8Q#
- 2.c8R#
- 1...Sh7
- 2.c8Q#
- 2.c8R#
- 1...e5
- 2.c8Q#
- 2.c8R#
- threat
- 1.dxc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 15
- Sets
- Q(h);N_GUARD::QAR2(C),XQ(h)
- Q(h);N_GUARD::QAR2(C)
- Q(h);N_GUARD,XB(J)::QAR2(C)
- R(c);::QAB(C)+R(D),DCHECK
- R(c);XB(J)::QAB(C)+R(D),DCHECK
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,XP(B)::S(A)
- B(a);N_GUARD::S(A),XB(a)
- P(g);SBLOCK,XP(F)::QAB(C)+R(D),DCHECK
- Tries
- Try
- S(I);
- Threat
- QAB(C)+R(D),DCHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h),XR(D)::B(J)+P(F),XP(g)
- B(a);N_GUARD,XP(B)::S(A)
- Refutation
- R(c);P_SPINR(c),XR(D)
- Try
- S(I);
- Threat
- QAB(C)+R(D),DCHECK
- Vars
- R(c);N_GUARD,P_SPINR(c),XR(D)::B(J)+P(F),XP(g)
- R(c);XB(J)::QAB(C)+R(D),DCHECK
- B(a);N_GUARD,XP(B)::S(A)
- Refutation
- Q(h);P_SPINQ(h),XR(D)
- Try
- R(D);CHECK
- Vars
- Q(h);N_GUARD,P_SPINQ(h)::QAB1(C),XQ(h)
- Refutation
- K(d);S_FLIGHT,XP(F)
- Try
- R(D);CHECK,XR(c)
- Vars
- Q(h);N_GUARD,P_SPINQ(h)::QAB1(C),XQ(h)
- Refutation
- K(d);S_FLIGHT,XP(F)
- Try
- Q(C);XR(c)
- Threat
- R1(D)
- Vars
- Q(h);OGATE,XR(D)::QAB1(C),XQ(h)
- B(a);N_GUARD,XP(B)::S(A)
- Q(h);N_GUARD::QAR2(C),XQ(h)
- P(f);N_GUARD::R1(D)
- Refutation
- B(a);
- Try
- Actual
- P(F);XP(g)
- Threat
- P=Q
- Vars
- Q(h);N_GUARD,P_SPINQ(h),XR(D)::B(J)+S(I)
- Q(h);N_GUARD,XB(J)::QAR2(C)
- R(c);N_GUARD,P_SPINR(c),XR(D)::B(J)+S(I)
- R(c);XB(J)::QAB(C)+R(D),DCHECK
- Q(h);N_GUARD::QAR2(C),XQ(h)
- Q(h);::P=Q
- Q(h);N_GUARD::B(J)+S(I)
- B(a);::P=Q
- B(a);N_GUARD::S(A),XB(a)
- S(b);::P=Q
- S(e);::P=Q
- P(f);::P=Q
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).