MESON Chess Problem Database
Problem Display
PID: 43261 (1K1RQR1r/1p2P2p/4k1Pn/6B1/2N3n1/8/8/1r1q4 w - - 0 1)
Mees, Wouter Jacob Gregorius
Probleemblad, 2002
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Rd6#
- 2.Qd7#
- 1...Qe2
- 2.Rd6#
- 2.Qd7#
- 1...Qb3
- 2.Rd6#
- 2.Qd7#
- 1...Qf3
- 2.Rd6#
- 2.Qd7#
- 1...Qa4
- 2.Rd6#
- 1...Qc1
- 2.Rd6#
- 2.Qd7#
- 1...Qe1
- 2.Rd6#
- 2.Qd7#
- 1...Qf1
- 2.Rd6#
- 2.Qd7#
- 1...Qg1
- 2.Rd6#
- 2.Qd7#
- 1...Qh1
- 2.Rd6#
- 2.Qd7#
- 1...Qd6+
- 2.Rxd6#
- 1...Qd7
- 2.Qxd7#
- 1...Qxd8+
- 2.exd8Q#
- 2.exd8R#
- 1...Rxf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sf2
- 2.Rf6#
- 1...Sh2
- 2.Rf6#
- 1...Se3
- 2.Rf6#
- 1...Se5
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...Sf5
- 2.Qf7#
- 1...Sf7
- 2.Qxf7#
- 1...Sg8
- 2.Qf7#
- 1...Qc2
- Tries
- 1.Rxd1?
- threat
- 2.Rd6#
- 2.Qd7#
- 2.Qc8#
- 1...Rxf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sf6
- 2.Rxf6#
- 1...Sf7
- 2.Qd7#
- 2.Qxf7#
- 2.Qc8#
- 1...Rb6
- 2.Qd7#
- 2.Qc8#
- 1...Se5
- 2.Rd6#
- 2.Rf6#
- 1...Sf5
- 2.Qd7#
- 2.Qf7#
- 2.Qc8#
- 1...Rxd1!
- threat
- 1.Rd2?
- threat
- 2.Qd7#
- 2.Qc8#
- 1...Rxf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sf6
- 2.Rxf6#
- 1...Qa4
- 2.Rd6#
- 1...Se5
- 2.Rf6#
- 1...Qxd2!
- threat
- 1.Rd3?
- threat
- 2.Qd7#
- 2.Qc8#
- 1...Rxf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sf6
- 2.Rxf6#
- 1...Qa4
- 2.Rd6#
- 1...Se5
- 2.Rf6#
- 1...Qxd3!
- threat
- 1.Rd4?
- threat
- 2.Qd7#
- 2.Qc8#
- 1...Rxf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sf6
- 2.Rxf6#
- 1...Qa4
- 2.Rd6#
- 1...Se5
- 2.Rf6#
- 1...Qxd4!
- threat
- 1.Qc6+?
- 1...Qd6+
- 2.Rxd6#
- 2.Qxd6#
- 1...bxc6+!
- 1...Qd6+
- 1.Rxd1?
- Keys
- 1.Qb5!
- threat
- 2.e8Q#
- 2.e8R#
- 1...Qd6+
- 2.Rxd6#
- 1...Qxd8+
- 2.exd8S#
- 1...Rxb5
- 2.e8Q#
- 2.e8R#
- 1...Rxf8
- 2.exf8S#
- 1...hxg6
- 2.e8Q#
- 2.e8R#
- 1...Sf6
- 2.Qe5#
- 1...Qd2
- 2.e8Q#
- 2.e8R#
- 1...Qc2
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qe2
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qb3
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qf3
- 2.Rd6#
- 2.Qd7#
- 2.e8Q#
- 2.e8R#
- 1...Qa4
- 2.Rd6#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qc1
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qe1
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qf1
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qg1
- 2.Rd6#
- 2.Qd7#
- 2.Qd5#
- 2.e8Q#
- 2.e8R#
- 1...Qh1
- 2.Rd6#
- 2.Qd7#
- 2.e8Q#
- 2.e8R#
- 1...Qd3
- 2.e8Q#
- 2.e8R#
- 1...Qd4
- 2.e8Q#
- 2.e8R#
- 1...Qd5
- 2.Qxd5#
- 2.e8Q#
- 2.e8R#
- 1...Qd7
- 2.Qxd7#
- 1...Ra1
- 2.e8Q#
- 2.e8R#
- 1...Rc1
- 2.e8Q#
- 2.e8R#
- 1...Rb2
- 2.e8Q#
- 2.e8R#
- 1...Rb3
- 2.e8Q#
- 2.e8R#
- 1...Rb4
- 2.e8Q#
- 2.e8R#
- 1...Rg8
- 2.e8Q#
- 2.e8R#
- 1...Sf2
- 2.Qe5#
- 2.e8Q#
- 2.e8R#
- 1...Sh2
- 2.Qe5#
- 2.e8Q#
- 2.e8R#
- 1...Se3
- 2.Qe5#
- 2.e8Q#
- 2.e8R#
- 1...Se5
- 2.Qxe5#
- 2.e8Q#
- 2.e8R#
- 1...Sf5
- 2.Qxf5#
- 1...Sf7
- 2.e8Q#
- 2.e8R#
- 1...Sg8
- 2.Qf5#
- 1...b6
- 2.e8Q#
- 2.e8R#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(b);N_GUARD::R1(F)
- Q(b);CHECK,N_GUARD::R1(F),XQ(b)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);CHECK,OGATE,XR(F)::PXQ(b)=Q
- R(h);OGATE,XR(H)::PXR(h)=Q
- S(c);N_GUARD::R1(H)
- S(c);N_GUARD::R1(H),XS(c)
- S(e);N_GUARD::QAB1(G)
- S(e);N_GUARD::QAB1(G),XS(e)
- Tries
- Try
- R(F);XQ(b)
- Threat
- DUALS(3)
- Vars
- R(h);OGATE,P_PINQ(G),XR(H)::PXR(h)=Q
- S(c);N_GUARD::R1(H),XS(c)
- Refutation
- R(a);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(h);OGATE,P_PINQ(G),XR(H)::PXR(h)=Q
- S(c);N_GUARD::R1(H),XS(c)
- Q(b);N_GUARD::R1(F)
- S(c);N_GUARD::R1(H)
- Refutation
- Q(b);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(h);OGATE,P_PINQ(G),XR(H)::PXR(h)=Q
- S(c);N_GUARD::R1(H),XS(c)
- Q(b);N_GUARD::R1(F)
- S(c);N_GUARD::R1(H)
- Refutation
- Q(b);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(h);OGATE,P_PINQ(G),XR(H)::PXR(h)=Q
- S(c);N_GUARD::R1(H),XS(c)
- Q(b);N_GUARD::R1(F)
- S(c);N_GUARD::R1(H)
- Refutation
- Q(b);XR(F)
- Try
- Q(G);CHECK
- Refutation
- P(f);CHECK,XQ(G)
- Try
- Actual
- Q(G);
- Threat
- P=Q
- Vars
- Q(b);CHECK,N_GUARD::R1(F),XQ(b)
- Q(b);CHECK,OGATE,XR(F)::PXQ(b)=S
- R(a);XQ(G)::P=Q
- R(h);OGATE,P_PINR(F),XR(H)::PXR(h)=S
- P(g);XP(C)::P=Q
- S(c);N_GUARD::QAR1(G)
- Q(b);::P=Q
- Q(b);N_GUARD::QAB1(G),XQ(b)
- R(a);::P=Q
- R(h);::P=Q
- S(e);N_GUARD::QAB1(G),XS(e)
- S(e);::P=Q
- S(e);N_GUARD::QAB1(G)
- 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).