MESON Chess Problem Database
Problem Display
PID: 193765 (3r4/4k1Pn/1NQb2p1/4p1P1/4K2B/p7/B7/8 w - - 0 1)
Mari, Carlo
L'Italia Scacchistica, 1916
#2
7 + 7
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Sf8
- 2.g8S#
- 1...Rd7
- Tries
- 1.Bb3?
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- 1...Sf8
- 2.g8S#
- 1...a2!
- 1...Sxg5+
- 1.Bc4?
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- 1...Sf8
- 2.g8S#
- 1...a2!
- 1...Sxg5+
- 1.Bd5?
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- 1...Sf8
- 2.g8S#
- 1...a2!
- 1...Sxg5+
- 1.Qb7+?
- 1...Ke8
- 2.Bf7#
- 2.Qf7#
- 1...Rd7
- 2.Qxd7#
- 1...Bc7!
- 1...Ke8
- 1.Qc7+?
- 1...Ke8
- 2.Bf7#
- 2.Qf7#
- 1...Rd7
- 2.Qxd7#
- 1...Bxc7!
- 1...Ke8
- 1.g8Q?
- threat
- 2.Sd5#
- 2.Qf7#
- 2.Qg7#
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Re8
- 2.Qd7#
- 2.Qcxe8#
- 2.Qgxe8#
- 1...Rf8
- 2.Qd7#
- 1...Rd7
- 2.Sd5#
- 2.Sc8#
- 2.Qxd7#
- 1...Ra8
- 2.Sd5#
- 2.Qd7#
- 1...Rb8
- 2.Sd5#
- 2.Qd7#
- 1...Rc8
- 2.Sd5#
- 2.Sxc8#
- 2.Qd7#
- 1...Bb4
- 2.Qf7#
- 2.Qce6#
- 2.Qg7#
- 1...Bc5
- 2.Qf7#
- 2.Qce6#
- 2.Qg7#
- 1...Bc7
- 2.Qf7#
- 2.Qce6#
- 2.Qg7#
- 1...Bb8
- 2.Qf7#
- 2.Qce6#
- 2.Qg7#
- 1...Rxg8!
- threat
- 1.g8R?
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Re8
- 2.Rxe8#
- 2.Qd7#
- 2.Qxe8#
- 1...Rf8
- 2.Qd7#
- 1...Rd7
- 2.Sc8#
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Sxc8#
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- 1...Sf8
- 2.Rg7#
- 1...Rxg8!
- 1...Sxg5+
- 1.Bb3?
- Keys
- 1.Bg8!
- threat
- 2.Sd5#
- 1...Sxg5+
- 2.Bxg5#
- 1...Sf6+
- 2.gxf6#
- 1...Rxg8
- 2.Qd7#
- 1...Rd7
- 2.Qxd7#
- 1...Ra8
- 2.Qd7#
- 1...Rb8
- 2.Qd7#
- 1...Rc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Bb4
- 2.Qe6#
- 1...Bc5
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 1...Bb8
- 2.Qe6#
- threat
- 1.Bg8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(g);N_GUARD::QAR1(F),XR(g)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- S(f);SBLOCK,S_CUTR(g)::P=S
- Tries
- Try
- B(A);
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD::QAR1(F),XR(g)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
- S(f);SBLOCK,S_CUTR(g)::P=S
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD::QAR1(F),XR(g)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
- S(f);SBLOCK,S_CUTR(g)::P=S
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD::QAR1(F),XR(g)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
- S(f);SBLOCK,S_CUTR(g)::P=S
- Refutation
- P(a);
- Try
- Q(F);CHECK
- Vars
- R(g);N_GUARD,P_SPINR(g)::QAR1(F),XR(g)
- Refutation
- B(c);P_SPINB(c)
- Try
- Q(F);CHECK
- Vars
- R(g);N_GUARD,P_SPINR(g)::QAR1(F),XR(g)
- Refutation
- B(c);XQ(F)
- Try
- P(G);
- Threat
- DUALS(3)
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD::QAR1(F)
- Refutation
- R(g);XQ(G)
- Try
- P(G);
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
- S(f);SBLOCK::R(G)
- Refutation
- R(g);XR(G)
- Try
- Actual
- B(A);
- Threat
- S(E)
- Vars
- S(f);CHECK,OGATE,P_SPINS(f),XP(D)::B(C),XS(f)
- S(f);CHECK,OGATE::P(D),XS(f)
- R(g);N_GUARD,XB(A)::QAR1(F)
- R(g);N_GUARD::QAR1(F),XR(g)
- R(g);N_GUARD::QAR1(F)
- B(c);OGATE::QAR1(F)
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).