MESON Chess Problem Database
Problem Display
PID: 90025 (5q2/4p2Q/R7/1P1k1n2/N1N2P1p/3Knp1B/3b1B2/4R3 w - - 0 1)
Popp, Willy
Die Schwalbe, 1949
#2
10 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Sab6#
- 2.Re5#
- 1...Sf1
- 2.Sab6#
- 2.Re5#
- 1...Sc2
- 2.Sab6#
- 2.Re5#
- 1...Sg2
- 2.Sab6#
- 2.Re5#
- 1...Sg4
- 2.Sab6#
- 1...Sg3
- 2.Be6#
- 1...Sd4
- 2.Qe4#
- 1...Sd6
- 2.Scb6#
- 1...Sh6
- 2.Be6#
- 2.Qe4#
- 1...Sg7
- 2.Qe4#
- 1...e5
- 2.Qb7#
- 1...e6
- 2.Qb7#
- 1...Sd1
- Tries
- 1.Sxe3+?
- 1...Sxe3
- 2.Be6#
- 2.Qe4#
- 1...Bxe3!
- 1...Sxe3
- 1.Bxf5?
- threat
- 2.Be4#
- 2.Be6#
- 1...Sxf5
- 2.Sab6#
- 2.Re5#
- 1...Qh6
- 2.Be4#
- 1...Qf6
- 2.Be4#
- 1...Qf7
- 2.Be4#
- 1...Qc8
- 2.Be4#
- 1...Qg8
- 2.Be4#
- 1...e6
- 2.Be4#
- 2.Bxe6#
- 2.Qb7#
- 1...Qxf5+!
- threat
- 1.Rd6+?
- 1...Sxd6
- 2.Scb6#
- 1...exd6!
- 1...Sxd6
- 1.Qxf5+?
- 1...Sxf5
- 2.Sab6#
- 2.Re5#
- 1...e5
- 2.Qe4#
- 2.Qe6#
- 2.Qxe5#
- 1...Qxf5+!
- 1...Sxf5
- 1.Qg6?
- threat
- 2.Scb6#
- 2.Qc6#
- 2.Qe6#
- 1...Sxc4
- 2.Qc6#
- 2.Qe6#
- 1...Qh6
- 2.Scb6#
- 1...Qf7
- 2.Scb6#
- 2.Qc6#
- 1...Qa8
- 2.Scb6#
- 2.Qe6#
- 1...Qb8
- 2.Qc6#
- 2.Qe6#
- 1...Qc8
- 2.Scb6#
- 1...Qd8
- 2.Qc6#
- 2.Qe6#
- 1...Qe8
- 2.Scb6#
- 2.Qe6#
- 1...Qg8
- 2.Scb6#
- 2.Qc6#
- 1...Ba5
- 2.Qc6#
- 2.Qe6#
- 1...Sd4
- 2.Scb6#
- 2.Qe4#
- 1...Sd6
- 2.Scb6#
- 2.Be6#
- 2.Qe6#
- 1...Sg7
- 2.Scb6#
- 2.Qe4#
- 2.Qc6#
- 1...e6
- 2.Qxe6#
- 1...Qf6!
- threat
- 1.Qg8+?
- 1...Qf7
- 2.Qa8#
- 1...e6
- 2.Qxe6#
- 1...Qxg8!
- 1...Qf7
- 1.Qh5?
- threat
- 2.Qxf3#
- 1...Sg4
- 2.Sab6#
- 1...e5!
- threat
- 1.Qxe7?
- threat
- 2.Sab6#
- 2.Scb6#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 2.Qb7#
- 1...Sxc4
- 2.Qe4#
- 2.Qe6#
- 2.Qb7#
- 1...Sxe7
- 2.Be6#
- 2.Rd6#
- 1...Qh6
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 1...Qg7
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 2.Qe4#
- 2.Qe6#
- 1...Qf6
- 2.Qc5#
- 2.Qe4#
- 1...Qf7
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 2.Qxf7#
- 1...Qa8
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf7#
- 1...Qb8
- 2.Qc5#
- 2.Qe4#
- 2.Qe6#
- 2.Qf7#
- 1...Qc8
- 2.Sab6#
- 2.Scb6#
- 2.Qe4#
- 2.Qe5#
- 1...Qd8
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 2.Qb7#
- 2.Qf7#
- 1...Qe8
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 1...Qg8
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 2.Qe4#
- 2.Qe5#
- 2.Qb7#
- 1...Qh8
- 2.Sab6#
- 2.Scb6#
- 2.Qc5#
- 2.Qe4#
- 2.Qe6#
- 2.Qb7#
- 2.Qf7#
- 1...Bc3
- 2.Sxc3#
- 2.Sab6#
- 2.Scb6#
- 2.Qe4#
- 2.Qe6#
- 2.Qb7#
- 1...Ba5
- 2.Qe4#
- 2.Qe5#
- 2.Qe6#
- 2.Qb7#
- 1...Sg4
- 2.Sab6#
- 2.Scb6#
- 2.Qe4#
- 2.Qe6#
- 2.Qb7#
- 1...Sg3
- 2.Sab6#
- 2.Scb6#
- 2.Be6#
- 2.Rd6#
- 2.Qe5#
- 2.Qe6#
- 2.Qb7#
- 1...Sd4
- 2.Sab6#
- 2.Scb6#
- 2.Rd6#
- 2.Qe4#
- 2.Qe5#
- 1...Sd6
- 2.Scb6#
- 2.Be6#
- 2.Rxd6#
- 2.Qe5#
- 2.Qe6#
- 1...Sg7
- 2.Sab6#
- 2.Scb6#
- 2.Rd6#
- 2.Qe4#
- 2.Qe5#
- 2.Qb7#
- 1...Qxe7!
- threat
- 1.Qf7+?
- 1...e6
- 2.Qxe6#
- 2.Qb7#
- 1...Qxf7!
- 1...e6
- 1.Sxe3+?
- Keys
- 1.Bg4!
- threat
- 2.Bxf3#
- 1...Sxg4
- 2.Sab6#
- 1...Sg3
- 2.Be6#
- 1...Sd4
- 2.Qe4#
- 1...Sd6
- 2.Scb6#
- 1...e5
- 2.Qb7#
- threat
- 1.Bg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- S(b);::S(E)
- S(f);OGATE::B(D)
- S(f);OGATE::QAB1(J)
- S(f);SBLOCK::S(F)
- P(g);OGATE::QAB(J)
- Tries
- Try
- S(F);CHECK,XS(b)
- Refutation
- B(a);XS(F)
- Try
- B(D);XS(f)
- Threat
- DUALS(2)
- Vars
- Q(h);::B(D)
- Refutation
- Q(h);CHECK,XB(D)
- Try
- R(I);CHECK
- Vars
- S(f);SBLOCK,XR(I)::S(F)
- Refutation
- P(g);XR(I)
- Try
- Q(J);CHECK,XS(f)
- Refutation
- Q(h);CHECK,XQ(J)
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(h);::S(F)
- P(g);::QAB1(J),XP(g)
- Refutation
- Q(h);
- Try
- Q(J);CHECK
- Vars
- Q(h);OGATE,P_SPINQ(h)::QAB(J)
- P(g);P_SPINP(g)::QAB1(J),XP(g)
- Refutation
- Q(h);XQ(J)
- Try
- Q(J);P_PINS(f)
- Threat
- QAB(J),XP(c)
- Vars
- S(b);::S(E)
- Refutation
- P(g);N_SPINS(f)
- Try
- Q(J);XP(g)
- Threat
- DUALS(6)
- Refutation
- Q(h);XQ(J)
- Try
- Q(J);CHECK
- Refutation
- Q(h);XQ(J)
- Try
- Actual
- B(D);
- Threat
- B(D),XP(c)
- Vars
- S(b);XB(D)::S(E)
- S(f);OGATE::B(D)
- S(f);OGATE::QAB1(J)
- S(f);SBLOCK::S(F)
- P(g);OGATE::QAB(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).