MESON Chess Problem Database
Problem Display
PID: 92885 (8/4p3/2p1P3/1pp2nQ1/1pP4R/1Pk4P/P2Npp2/KB2B3 w - - 0 1)
Scheel, Johan
Tidskrift for Schack, 1911
#2
11 + 9
| 1829 | The Theory of Pawn Promotion | 1912 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Se3
- 2.Qxe3#
- 2.Qe5#
- 2.Qg7#
- 1...Sg3
- 2.Qe3#
- 2.Qxg3#
- 2.Qe5#
- 2.Qg7#
- 1...Sd4
- 2.Se4#
- 2.Qe3#
- 1...Sxh4
- 2.Qe3#
- 2.Qe5#
- 2.Qg7#
- 1...Sd6
- 2.Qe3#
- 2.Qg3#
- 2.Qe5#
- 2.Qg7#
- 1...Sh6
- 2.Qe3#
- 2.Qg3#
- 2.Qe5#
- 2.Qg7#
- 1...Sg7
- 2.Qe3#
- 2.Qg3#
- 2.Qe5#
- 2.Qxg7#
- 1...f1Q
- 2.Sxf1#
- 1...f1S
- 2.Sxf1#
- 1...f1B
- 2.Sxf1#
- 2.Sf3#
- 1...f1R
- 2.Sxf1#
- 1...bxc4
- 2.Rxc4#
- 1...Se3
- Tries
- 1.Sf1+?
- 1...fxe1S
- 2.Qd2#
- 1...fxe1B
- 2.Qc1#
- 1...fxe1R
- 2.Qd2#
- 1...fxe1Q!
- 1...fxe1S
- 1.Sf3+?
- 1...fxe1S
- 2.Qd2#
- 1...fxe1B
- 2.Qc1#
- 1...fxe1R
- 2.Qd2#
- 1...fxe1Q!
- 1...fxe1S
- 1.Rd4?
- threat
- 2.Rd3#
- 1...Kxd4
- 2.Sf3#
- 1...Sxd4
- 2.Se4#
- 2.Qe3#
- 1...bxc4
- 2.Rxc4#
- 1...cxd4
- 2.Se4#
- 1...fxe1S!
- threat
- 1.Qf6+?
- 1...Sd4
- 2.Se4#
- 1...exf6!
- 1...Sd4
- 1.Qg3+?
- 1...Se3
- 2.Qe5#
- 2.Qxe3#
- 2.Qg7#
- 1...Sxg3!
- 1...Se3
- 1.Qxf5?
- threat
- 2.Qc2#
- 2.Qd3#
- 2.Qf3#
- 2.Qe5#
- 1...fxe1Q
- 2.Qc2#
- 2.Qd3#
- 1...fxe1B
- 2.Qc2#
- 2.Qd3#
- 1...fxe1R
- 2.Qc2#
- 2.Qd3#
- 1...bxc4
- 2.Rxc4#
- 2.Qc2#
- 2.Qf3#
- 2.Qe5#
- 1...f1Q
- 2.Sxf1#
- 2.Qc2#
- 2.Qd3#
- 2.Qe5#
- 1...f1S
- 2.Sxf1#
- 2.Qc2#
- 2.Qd3#
- 2.Qe5#
- 1...f1R
- 2.Sxf1#
- 2.Qc2#
- 2.Qd3#
- 2.Qe5#
- 1...fxe1S!
- threat
- 1.Qg7+?
- 1...Sd4
- 2.Se4#
- 1...Sxg7!
- 1...Sd4
- 1.cxb5?
- threat
- 2.Rc4#
- 1...Sxh4
- 2.Qe3#
- 2.Qxc5#
- 2.Qe5#
- 2.Qg7#
- 1...Se3
- 2.Qxe3#
- 2.Qe5#
- 2.Qg7#
- 1...Sd4
- 2.Se4#
- 2.Qe3#
- 2.Qxc5#
- 1...Sd6
- 2.Qe3#
- 2.Qg3#
- 2.Qe5#
- 2.Qg7#
- 1...c4
- 2.Rxc4#
- 1...cxb5!
- threat
- 1.Sf1+?
- Keys
- 1.Qg1!
- 1...Sxh4
- 2.Qg7#
- 1...fxe1Q
- 2.Se4#
- 1...fxe1S
- 2.Se4#
- 1...fxe1B
- 2.Se4#
- 1...fxe1R
- 2.Se4#
- 1...fxg1Q
- 2.Sf1#
- 1...fxg1S
- 2.Sf1#
- 2.Sf3#
- 1...fxg1B
- 2.Sf1#
- 2.Sf3#
- 1...fxg1R
- 2.Sf1#
- 1...bxc4
- 2.Rxc4#
- 1...f1Q
- 2.Sxf1#
- 2.Se4#
- 1...f1S
- 2.Sxf1#
- 2.Se4#
- 1...f1B
- 2.Sxf1#
- 2.Sf3#
- 2.Se4#
- 1...f1R
- 2.Sxf1#
- 2.Se4#
- 1...Se3
- 2.Qg7#
- 1...Sg3
- 2.Qxg3#
- 1...Sd4
- 2.Se4#
- 1...Sd6
- 2.Qg3#
- 2.Qg7#
- 1...Sh6
- 2.Qg3#
- 2.Qg7#
- 1...Sg7
- 2.Qg3#
- 2.Qxg7#
- 1...Sxh4
- 1.Qg1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 3
- Sets
- P(b);N_GUARD::B(C)+S(E),XQ(b)
- P(b);N_GUARD::B(C)+S(E),XS(b)
- P(b);N_GUARD::B(C)+S(E),XR(b)
- P(e);OGATE,XP(H)::R1(I),XP(e)
- Tries
- Try
- S(E);CHECK
- Vars
- P(b);XB(C)::QAB1(J)
- P(b);XB(C)::QAR2(J)
- P(b);P_PINB(B),XB(C)::QAB1(J)
- Refutation
- P(b);P_PINB(B),XB(C)
- Try
- S(E);CHECK
- Vars
- P(b);XB(C)::QAB1(J)
- P(b);XB(C)::QAR2(J)
- P(b);P_PINB(B),XB(C)::QAB1(J)
- Refutation
- P(b);P_PINB(B),XB(C)
- Try
- R(I);
- Threat
- R1(I)
- Vars
- K(c);S_FLIGHT,XR(I)::S(E)
- P(e);OGATE,XP(H)::R1(I),XP(e)
- P(f);SBLOCK,XR(I)::B(C)+S(E),DCHECK
- Refutation
- P(b);XB(C)
- Try
- Q(J);CHECK
- Vars
- S(g);P_SPINS(g)::B(C)+S(E),DCHECK
- Refutation
- P(i);XQ(J)
- Try
- Q(J);CHECK
- Refutation
- S(g);XQ(J)
- Try
- Q(J);XS(g)
- Threat
- DUALS(4)
- Refutation
- P(b);XB(C)
- Try
- Q(J);CHECK
- Vars
- S(g);P_SPINS(g)::B(C)+S(E),DCHECK
- Refutation
- S(g);XQ(J)
- Try
- P(H);XP(e)
- Threat
- R1(I)
- Vars
- P(f);::R1(I),XP(f)
- Refutation
- P(h);XP(H)
- Try
- Actual
- Q(J);
- Vars
- S(g);N_GUARD,XR(I)::QAB(J)
- P(b);P_PINB(B),XB(C)::S(E)
- P(b);XB(C)::S(E)
- P(b);N_GUARD,XQ(J)::B(C)+S(E)
- P(e);OGATE,XP(H)::R1(I),XP(e)
- S(g);N_GUARD::QAB(J)
- S(g);N_GUARD::QAR(J),XS(g)
- S(g);SBLOCK::B(C)+S(E),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).