MESON Chess Problem Database
Problem Display
PID: 90198 (8/1BB5/p2N1p1r/P1kq3R/P1b1Qn2/6Nr/7p/1R2n2K w - - 0 1)
Wielgos, Oskar
Die Schwalbe, 1961
#2
10 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Qe3#
- 2.Qxc4#
- 1...Qf5
- 2.Qe3#
- 2.Qxc4#
- 1...Qg5
- 2.Qe3#
- 2.Qxc4#
- 1...Qxh5
- 2.Qe3#
- 2.Qxc4#
- 1...Seg2
- 2.Qxc4#
- 1...Sf3
- 2.Qxc4#
- 1...Sfg2
- 2.Qxc4#
- 1...Qe5
- Tries
- 1.Sgf5?
- threat
- 2.Bb6#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qxb7
- 2.Sxb7#
- 1...Qxf5
- 2.Qxc4#
- 1...Qxd6
- 2.Bxd6#
- 1...Qc6
- 2.Qxc6#
- 1...Rb3!
- threat
- 1.Sxc4?
- threat
- 2.Bb6#
- 2.Bd6#
- 1...R3xh5
- 2.Bb6#
- 1...R6xh5
- 2.Bb6#
- 1...Sxh5
- 2.Bb6#
- 2.Qxd5#
- 1...f5!
- threat
- 1.Sf7?
- threat
- 2.Bb6#
- 2.Bd6#
- 1...R3xh5
- 2.Bb6#
- 1...R6xh5
- 2.Bb6#
- 1...Sxh5
- 2.Bb6#
- 1...f5!
- threat
- 1.Sc8?
- threat
- 2.Bb6#
- 2.Bd6#
- 1...R3xh5
- 2.Bb6#
- 1...R6xh5
- 2.Bb6#
- 1...Sxh5
- 2.Bb6#
- 1...f5!
- threat
- 1.Se8?
- threat
- 2.Bb6#
- 2.Bd6#
- 1...R3xh5
- 2.Bb6#
- 1...R6xh5
- 2.Bb6#
- 1...Sxh5
- 2.Bb6#
- 1...f5!
- threat
- 1.Bxd5?
- threat
- 2.Sb7#
- 2.Qe3#
- 2.Qxc4#
- 1...Rxg3
- 2.Sb7#
- 2.Qxc4#
- 1...R3xh5
- 2.Sb7#
- 2.Qxc4#
- 1...R6xh5
- 2.Sb7#
- 2.Qxc4#
- 1...Sxd5
- 2.Qxc4#
- 1...Sxh5
- 2.Sb7#
- 2.Qxc4#
- 1...f5
- 2.Sb7#
- 2.Qxc4#
- 1...Bf1
- 2.Sb7#
- 2.Qe3#
- 2.Qb4#
- 1...Ba2
- 2.Sb7#
- 2.Qe3#
- 2.Qb4#
- 1...Be2
- 2.Sb7#
- 2.Qe3#
- 2.Qb4#
- 1...Bb3
- 2.Sb7#
- 1...Bd3
- 2.Sb7#
- 2.Qe3#
- 2.Qb4#
- 1...Bb5
- 2.Sb7#
- 2.Qe3#
- 2.Qb4#
- 1...Sc2
- 2.Sb7#
- 2.Qxc4#
- 1...Seg2
- 2.Sb7#
- 2.Qxc4#
- 1...Sf3
- 2.Sb7#
- 2.Qxc4#
- 1...Se2
- 2.Sb7#
- 2.Qxc4#
- 1...Sfg2
- 2.Sb7#
- 2.Qxc4#
- 1...Se6
- 2.Sb7#
- 2.Qxc4#
- 1...Bxd5!
- threat
- 1.Rxd5+?
- 1...Sxd5
- 2.Qxc4#
- 1...Bxd5!
- 1...Sxd5
- 1.Sgf5?
- Keys
- 1.Sdf5!
- threat
- 2.Bb6#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qxb7
- 2.Bd6#
- 1...Qxf5
- 2.Qe3#
- 1...Qc6
- 2.Qxc6#
- 1...Qe6
- 2.Qd4#
- 1...Qd6
- 2.Bxd6#
- 1...Qd8
- 2.Qc6#
- threat
- 1.Sdf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- S(a);N_PINQ(E)::QAR1(E),XB(d)
- S(e);N_PINQ(E)::QAR1(E),XB(d)
- Tries
- Try
- S(C);N_PINQ(g)
- Threat
- B(J)
- Vars
- Q(g);CHECK,XQ(E)::S(H),XQ(g)
- Q(g);XB(I)::S(H),XQ(g)
- Q(g);N_PINQ(E),P_SPINQ(g),XS(C)::QAR1(E),XB(d)
- Q(g);N_PINQ(E),OGATE,XS(H)::B(J),XQ(g)
- Q(g);::QAR1(E),XQ(g)
- Refutation
- R(c);
- Try
- S(H);XB(d)
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINQ(g),XR(G)::B(J)
- R(j);N_SPINQ(g),XR(G)::B(J)
- Refutation
- P(i);N_SPINQ(g)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINQ(g),XR(G)::B(J)
- R(j);N_SPINQ(g),XR(G)::B(J)
- S(e);N_SPINQ(g),XR(G)::B(J)
- Refutation
- P(i);N_SPINQ(g)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINQ(g),XR(G)::B(J)
- R(j);N_SPINQ(g),XR(G)::B(J)
- S(e);N_SPINQ(g),XR(G)::B(J)
- Refutation
- P(i);N_SPINQ(g)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINQ(g),XR(G)::B(J)
- R(j);N_SPINQ(g),XR(G)::B(J)
- S(e);N_SPINQ(g),XR(G)::B(J)
- Refutation
- P(i);N_SPINQ(g)
- Try
- B(I);N_SPINQ(E),XQ(g)
- Threat
- DUALS(3)
- Vars
- S(e);P_SPINS(e),XB(I)::QAR1(E),XB(d)
- B(d);::S(H)
- Refutation
- B(d);P_PINQ(E),P_SPINB(d),XB(I)
- Try
- R(G);CHECK,N_SPINQ(E),XQ(g)
- Vars
- S(e);XR(G)::QAR1(E),XB(d)
- Refutation
- B(d);P_PINQ(E),XR(G)
- Try
- Actual
- S(H);N_PINQ(g)
- Threat
- B(J)
- Vars
- Q(g);CHECK,XQ(E)::S(C),XQ(g)
- Q(g);N_GUARD,XB(I)::B(J)
- Q(g);N_PINQ(E),P_SPINQ(g),XS(H)::QAB(E)
- Q(g);::QAR1(E),XQ(g)
- Q(g);N_PINQ(E)::QAB1(E)
- Q(g);N_GUARD,N_PINQ(E)::B(J),XQ(g)
- Q(g);N_PINQ(E)::QAR1(E)
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).