MESON Chess Problem Database
Problem Display
PID: 262027 (8/5PK1/Bq1ppB2/5kpb/6R1/2p1rpQP/2N5/8 w - - 0 1)
Somma, Francesco
Schweizerische Schachzeitung, 1924
#2
8 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Sxd4#
- 1...Qa5
- 2.Sxe3#
- 2.Sd4#
- 1...Qc7
- 2.Sxe3#
- 2.Sd4#
- 1...Qd8
- 2.Sxe3#
- 2.Sd4#
- 1...Qb1
- 2.Sxe3#
- 2.Sd4#
- 1...Qb2
- 2.Sxe3#
- 2.Sd4#
- 1...Qb3
- 2.Sxe3#
- 2.Sd4#
- 1...Qb4
- 2.Sxe3#
- 1...Qb5
- 2.Sxe3#
- 2.Sd4#
- 1...Qxa6
- 2.Sxe3#
- 2.Sd4#
- 1...Qc6
- 2.Sxe3#
- 2.Sd4#
- 1...Qb7
- 2.Sxe3#
- 2.Sd4#
- 1...Qb8
- 2.Sxe3#
- 2.Sd4#
- 1...Re1
- 2.Qxf3#
- 1...Re2
- 2.Qxf3#
- 1...Rd3
- 2.Bxd3#
- 1...Re4
- 2.Rxg5#
- 1...Re5
- 2.Qxf3#
- 1...Bxg4
- 2.Qxg4#
- 1...e5
- 2.Bc8#
- 1...Qd4
- Tries
- 1.Bd3+?
- 1...Re4
- 2.Bxe4#
- 2.Rxg5#
- 2.Qxf3#
- 1...Rxd3!
- 1...Re4
- 1.Bb7?
- threat
- 2.Rxg5#
- 1...Qxb7
- 2.Sxe3#
- 2.Sd4#
- 1...Bxg4
- 2.Qxg4#
- 2.hxg4#
- 1...e5
- 2.Bc8#
- 1...Qc6
- 2.Sxe3#
- 2.Sd4#
- 1...d5!
- threat
- 1.Bxg5?
- threat
- 2.Qf4#
- 1...Qd4+
- 2.Sxd4#
- 1...e5
- 2.Bc8#
- 1...Qb4
- 2.Sxe3#
- 1...Re4!
- threat
- 1.Rc4?
- threat
- 2.Qxg5#
- 1...e5
- 2.Bc8#
- 1...Bg4
- 2.Qxg4#
- 2.hxg4#
- 1...g4
- 2.Rf4#
- 2.Qf4#
- 1...Qd4!
- threat
- 1.Rd4?
- threat
- 2.Sxe3#
- 2.Qxg5#
- 1...e5
- 2.Bc8#
- 1...Re1
- 2.Qxg5#
- 1...Re2
- 2.Qxg5#
- 1...Rd3
- 2.Bxd3#
- 2.Qxg5#
- 1...Re4
- 2.Qxg5#
- 1...Re5
- 2.Qxg5#
- 1...Bg4
- 2.Sxe3#
- 2.Qxg4#
- 2.hxg4#
- 1...g4
- 2.Sxe3#
- 2.Rf4#
- 2.Qf4#
- 1...Qxd4!
- threat
- 1.Qh4?
- threat
- 2.Rxg5#
- 2.Qxg5#
- 1...Bxg4
- 2.Qxg4#
- 1...e5
- 2.Bc8#
- 1...gxh4!
- threat
- 1.Bd3+?
- Keys
- 1.Bd4!
- threat
- 2.Sxe3#
- 1...Qxd4+
- 2.Sxd4#
- 1...Bxg4
- 2.Qxg4#
- 1...e5
- 2.Bc8#
- 1...Re1
- 2.Qxf3#
- 1...Re2
- 2.Qxf3#
- 1...Rd3
- 2.Bxd3#
- 1...Re4
- 2.Rxg5#
- 1...Re5
- 2.Qxf3#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(g);N_GUARD,P_PINB(F)::S(A),XQ(g)
- Q(g);N_GUARD::S(A),XR(b)
- R(b);N_GUARD::QAR2(B),XP(c)
- R(b);N_GUARD::B(E),XR(b)
- R(b);SBLOCK::R1(D),XP(e)
- B(f);OGATE,XR(D)::QAB1(B),XB(f)
- P(i);OGATEB::B(E)
- Tries
- Try
- B(E);CHECK
- Refutation
- R(b);XB(E)
- Try
- B(E);
- Threat
- R1(D),XP(e)
- Vars
- P(i);OGATEB::B(E)
- Refutation
- P(h);
- Try
- B(F);XP(e)
- Threat
- QAR1(B)
- Vars
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- P(i);OGATEB::B(E)
- Q(g);N_GUARD::S(A),XR(b)
- Refutation
- R(b);
- Try
- R(D);
- Threat
- QAR1(B),XP(e)
- Vars
- P(i);OGATEB::B(E)
- Refutation
- Q(g);P_PINB(F)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- P(i);OGATEB::B(E)
- R(b);::QAR1(B),XP(e)
- Refutation
- Q(g);P_PINB(F),XR(D)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(f);OGATE,XR(D)::QAB1(B),XB(f)
- P(i);OGATEB::B(E)
- Refutation
- P(e);XQ(B)
- Try
- Actual
- B(F);
- Threat
- S(A),XR(b)
- Vars
- Q(g);CHECK,XB(F)::S(A),XQ(g)
- B(f);OGATE,XR(D)::QAB1(B),XB(f)
- P(i);OGATEB::B(E)
- R(b);N_GUARD::QAR2(B),XP(c)
- R(b);N_GUARD::B(E),XR(b)
- R(b);SBLOCK::R1(D),XP(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).