MESON Chess Problem Database
Problem Display
PID: 59421 (8/2N3Qn/4p2N/2p5/2Pp1kbR/3P4/3PqPBK/8 w - - 0 1)
Lewis, Robert Tony
Mat Plus, 1996
#2
10 + 7
| 1099 | WCSC | 1994 |
| 5396 | World Chess Solving Championship 1977-1996 | 1997 |
| 23 | Die Schwalbe | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Sxe6#
- 1...Qf1
- 2.Sxe6#
- 2.Rxg4#
- 1...Qxd3
- 2.Sxe6#
- 2.Rxg4#
- 1...Qf3
- 2.Sxe6#
- 1...Qe1
- 2.Rxg4#
- 1...Qxd2
- 2.Sxe6#
- 2.Rxg4#
- 1...Qxf2
- 2.Sxe6#
- 2.Rxg4#
- 1...Qe3
- 2.Rxg4#
- 1...Qe4
- 2.Rxg4#
- 1...Qe5
- 2.Rxg4#
- 2.Qxg4#
- 1...Sg5
- 2.Qf6#
- 1...Sf6
- 2.Qxf6#
- 1...Sf8
- 2.Qf6#
- 1...e5
- 2.Sd5#
- 2.Se6#
- 1...Qd1
- Tries
- 1.Bh1?
- 1...Qxd3
- 2.Sxe6#
- 2.Rxg4#
- 1...Qxd2
- 2.Sxe6#
- 2.Rxg4#
- 1...Sf6
- 2.Qxf6#
- 1...e5
- 2.Sd5#
- 2.Se6#
- 1...Qd1
- 2.Sxe6#
- 1...Qf1
- 2.Sxe6#
- 2.Rxg4#
- 1...Qf3
- 2.Sxe6#
- 1...Qe1
- 2.Rxg4#
- 1...Qe3
- 2.Rxg4#
- 1...Qe4
- 2.Rxg4#
- 1...Qe5
- 2.Rxg4#
- 2.Qxg4#
- 1...Sg5
- 2.Qf6#
- 1...Sf8
- 2.Qf6#
- 1...Qxf2+!
- 1...Qxd3
- 1.Qe5+?
- 1...Qxe5
- 2.Rxg4#
- 1...Kxe5!
- 1...Qxe5
- 1.Qh8?
- 1...Qxd3
- 2.Sxe6#
- 2.Rxg4#
- 1...Qxd2
- 2.Sxe6#
- 2.Rxg4#
- 1...Qxf2
- 2.Sxe6#
- 2.Rxg4#
- 1...Sf6
- 2.Qxf6#
- 1...e5
- 2.Se6#
- 1...Qd1
- 2.Sxe6#
- 1...Qf1
- 2.Sxe6#
- 2.Rxg4#
- 1...Qf3
- 2.Sxe6#
- 1...Qe1
- 2.Rxg4#
- 1...Qe3
- 2.Rxg4#
- 1...Qe4
- 2.Rxg4#
- 1...Qe5
- 2.Rxg4#
- 1...Sg5
- 2.Qf6#
- 1...Sf8
- 2.Qf6#
- 1...Kg5!
- 1...Qxd3
- 1.Qxg4+?
- 1...Ke5
- 2.Qxe6#
- 2.Qf4#
- 1...Qxg4!
- 1...Ke5
- 1.Bh1?
- Keys
- 1.Rh5!
- 1...Qxd3
- 2.Qe5#
- 2.Qxg4#
- 1...Qxd2
- 2.Qe5#
- 2.Qxg4#
- 1...Qxf2
- 2.Qe5#
- 2.Qxg4#
- 1...Bxh5
- 2.Qg3#
- 1...e5
- 2.Sd5#
- 1...Qd1
- 2.Qe5#
- 1...Qf1
- 2.Qe5#
- 2.Qxg4#
- 1...Qf3
- 2.Qe5#
- 1...Qe1
- 2.Qxg4#
- 1...Qe3
- 2.Qxg4#
- 1...Qe4
- 2.Qxg4#
- 1...Qe5
- 2.Qxe5#
- 2.Qxg4#
- 1...Bf3
- 2.Qg3#
- 1...Bh3
- 2.Qg3#
- 1...Bf5
- 2.Qg3#
- 1...Sg5
- 2.Qxg5#
- 1...Sf6
- 2.Qg5#
- 1...Sf8
- 2.Qg5#
- 1...Qxd3
- 1.Rh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- Q(a);N_GUARD::S(I),XP(f)
- Q(a);N_GUARD::R1(G),XB(d)
- S(g);N_GUARD::QAR2(J)
- S(g);N_GUARD::QAR2(J),XS(g)
- Tries
- Try
- B(C);P_SPINP(B)
- Vars
- S(g);N_GUARD::QAR2(J),XS(g)
- Q(a);N_GUARD,N_PINP(B)::S(I),XP(f)
- Q(a);N_GUARD,N_PINP(B)::R1(G),XB(d)
- S(g);N_GUARD::QAR2(J)
- Refutation
- Q(a);CHECK,XP(B)
- Try
- Q(J);CHECK
- Vars
- Q(a);SBLOCK,XQ(J)::R1(G),XB(d)
- Refutation
- K(c);N_SPINB(d),S_FLIGHT,XQ(J)
- Try
- Q(J);
- Vars
- S(g);N_GUARD::QAR2(J),XS(g)
- P(f);S_CUTQ(a)::S(I)
- Q(a);N_GUARD::S(I),XP(f)
- Q(a);N_GUARD::R1(G),XB(d)
- S(g);N_GUARD::QAR2(J)
- Refutation
- K(c);N_SPINB(d),S_FLIGHT
- Try
- Q(J);CHECK,XB(d)
- Refutation
- Q(a);P_SPINQ(a),XQ(J)
- Try
- Actual
- R(G);N_PINB(d)
- Vars
- B(d);OGATE,XR(G)::QAB1(J)
- P(f);N_GUARD::S(I)
- Q(a);N_GUARD::QAB1(J)
- Q(a);N_GUARD::QAR1(J),XB(d)
- B(d);OGATE::QAB1(J)
- S(g);N_GUARD::QAB1(J),XS(g)
- S(g);N_GUARD::QAB1(J)
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).