MESON Chess Problem Database
Problem Display
PID: 249305 (8/8/qQ2P2B/2nP2N1/1P1R1NK1/4kp1p/2P1rpP1/R2B2n1 w - - 0 1)
van Dooren, Rene
The Problemist, 1990
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Qd3
- 2.Rxd3#
- 1...Qb7
- 2.Rd3#
- 1...Qc8
- 2.Rd3#
- 1...Qxa1
- 2.Rd3#
- 1...Qa2
- 2.Rd3#
- 1...Qa4
- 2.Rd3#
- 1...Qa5
- 2.Rd3#
- 1...Qa7
- 2.Rd3#
- 1...Qa8
- 2.Rd3#
- 1...Rd2
- 2.Re4#
- 1...Sb3
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 1...Se4
- 2.Rd3#
- 1...Sxe6
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sd7
- 2.Rd3#
- 1...Qd3
- Tries
- 1.Sxe2?
- threat
- 2.Sxf3#
- 2.Sxh3#
- 2.Se4#
- 2.Sf7#
- 2.Sh7#
- 1...Qxe2
- 2.Sxf3#
- 1...Sxe6
- 2.Sxe6#
- 2.Rd3#
- 1...fxe2
- 2.Sf3#
- 1...fxg2
- 2.Sf3#
- 2.Sxh3#
- 2.Se4#
- 2.Sf7#
- 2.Sh7#
- 1...hxg2
- 2.Sxf3#
- 2.Sh3#
- 2.Se4#
- 2.Sf7#
- 2.Sh7#
- 1...Sd3
- 2.Rxd3#
- 1...f1Q
- 2.Sxh3#
- 2.Se4#
- 1...f1S
- 2.Sxh3#
- 2.Se4#
- 1...f1B
- 2.Sxh3#
- 2.Se4#
- 1...f1R
- 2.Sxh3#
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 2.Rd3#
- 1...h2
- 2.Sxf3#
- 2.Sh3#
- 2.Se4#
- 2.Sf7#
- 2.Sh7#
- 1...Sxe2!
- threat
- 1.Sxf3?
- threat
- 2.Sxe2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sg6#
- 1...Rxc2
- 2.Se2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sg6#
- 1...Sxe6
- 2.Sxe6#
- 1...hxg2
- 2.Sxe2#
- 2.Sxg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sh5#
- 2.Sg6#
- 1...f1Q
- 2.Sd3#
- 2.Sxh3#
- 1...f1S
- 2.Sd3#
- 2.Sxh3#
- 1...f1B
- 2.Sd3#
- 2.Sxh3#
- 1...f1R
- 2.Sd3#
- 2.Sxh3#
- 1...Qd3
- 2.Sxe2#
- 2.Sxd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sg6#
- 1...Re1
- 2.Se2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sg6#
- 1...Rd2
- 2.Se2#
- 2.Sd3#
- 2.Sxh3#
- 2.Sh5#
- 2.Sg6#
- 1...Sd3
- 2.Sxd3#
- 1...Se4
- 2.Rd3#
- 1...h2
- 2.Sxe2#
- 2.Sd3#
- 2.Sh3#
- 2.Sh5#
- 2.Sg6#
- 1...Sxf3!
- threat
- 1.Se4?
- threat
- 2.Sxe2#
- 1...Rxc2
- 2.Se2#
- 1...Sxe4
- 2.Rd3#
- 1...Sxe6
- 2.Sxe6#
- 1...Re1
- 2.Se2#
- 1...Rd2
- 2.Se2#
- 1...Sd3
- 2.Sxd3#
- 1...Kxd4!
- threat
- 1.Qxc5?
- threat
- 2.Rd3#
- 1...Qd3
- 2.Rxd3#
- 1...Qxe6+!
- threat
- 1.Sxe2?
- Keys
- 1.Sd3!
- threat
- 2.Sxf3#
- 1...Kd2
- 2.Se4#
- 1...Kxd4
- 2.Qxc5#
- 1...Sxd3
- 2.Rxd3#
- 1...Sxe6
- 2.Sxe6#
- 1...fxg2
- 2.Sf3#
- 1...Se4
- 2.Sxe4#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- Q(h);N_GUARD::R1(F),XQ(h)
- Q(h);N_GUARD::R1(F)
- Q(h);N_GUARD,P_PINP(L)::R1(F)
- Q(h);N_GUARD,XR(A)::R1(F)
- R(b);SBLOCK::R1(F)
- S(g);::QAB(K)+R(F),DCHECK
- S(g);::QAB(K)+R(F),DCHECK,XS(g)
- S(g);XP(L)::QAB(K)+R(F),DCHECK
- Tries
- Try
- S(G);XR(b)
- Threat
- DUALS(5)
- Vars
- Q(h);XS(G)::B(M)+S(J),XP(e)
- P(e);XS(G)::B(M)+S(J)
- S(g);::QAB(K)+R(F),DCHECK,XS(g)
- Refutation
- S(a);XS(G)
- Try
- S(J);XP(e)
- Threat
- DUALS(5)
- Vars
- S(g);XP(L)::B(M)+S(G),XS(g)
- S(g);::B(M)+S(G),XS(g)
- S(g);SBLOCK::QAB(K)+R(F),DCHECK
- Refutation
- S(a);XS(J)
- Try
- S(J);
- Threat
- B(M)+S(G),XR(b)
- Vars
- R(b);XP(C)::B(M)+S(G)
- S(g);SBLOCK,XS(J)::QAB(K)+R(F),DCHECK
- S(g);XP(L)::B(M)+S(G),XS(g)
- R(b);::B(M)+S(G)
- S(g);::B(M)+S(G),XS(g)
- Refutation
- K(d);P_SPINS(g),S_FLIGHT,XR(F)
- Try
- Q(K);XS(g)
- Threat
- QAB(K)+R(F),DCHECK
- Vars
- Q(h);::QAB(K)+R(F),DCHECK,XQ(h)
- Refutation
- Q(h);CHECK,XP(L)
- Try
- Actual
- S(G);
- Threat
- B(M)+S(J),XP(e)
- Vars
- K(d);S_FLIGHT::B(M)+S(J),DCHECK
- K(d);OGATEB,P_SPINS(g),S_FLIGHT,XR(F)::QAB1(K),XS(g)
- S(g);OGATE,XS(G)::QAB(K)+R(F),DCHECK,XS(g)
- S(g);XP(L)::B(M)+S(J),XS(g)
- P(e);XP(D)::B(M)+S(J)
- S(g);::B(M)+S(J),XS(g)
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).