MESON Chess Problem Database
Problem Display
PID: 202390 (2B1b3/1p2rPB1/pK1p3R/n2k4/3Npb2/1Pp1P3/Q4n2/8 w - - 0 1)
Somma, Francesco
L'Alfiere di Re, 1923
#2
9 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Bxe6#
- 1...Rc7
- 2.Be6#
- 1...Rd7
- 2.Qxa5#
- 1...Rxf7
- 2.Be6#
- 1...Bxf7
- 2.Qxa5#
- 1...Sxb3
- 2.Qxb3#
- 1...Sc4+
- 2.bxc4#
- 1...Sc6
- 2.b4#
- 1...Re6
- Tries
- 1.Sc2?
- threat
- 2.Sb4#
- 1...Bxe3+
- 2.Sxe3#
- 1...Sc4+
- 2.bxc4#
- 1...Sxb3
- 2.Qxb3#
- 1...Sc6
- 2.b4#
- 1...Sd3!
- threat
- 1.Bxb7+?
- 1...Bc6
- 2.Qxa5#
- 1...Sc6
- 2.Qa5#
- 2.b4#
- 1...Sxb7
- 2.b4#
- 1...Rxb7+!
- 1...Bc6
- 1.b4+?
- 1...Sb3
- 2.Qxb3#
- 1...Sc4+!
- 1...Sb3
- 1.fxe8Q?
- threat
- 2.Qxa5#
- 1...Sc4+
- 2.bxc4#
- 1...Sxb3
- 2.Qxb3#
- 1...Rc7
- 2.Be6#
- 2.Qe6#
- 1...Sc6
- 2.b4#
- 1...Sd3!
- threat
- 1.fxe8S?
- threat
- 2.Qxa5#
- 1...Sc4+
- 2.bxc4#
- 1...Sxb3
- 2.Qxb3#
- 1...Rc7
- 2.Sxc7#
- 2.Be6#
- 1...Sc6
- 2.b4#
- 1...Sd3!
- threat
- 1.fxe8B?
- threat
- 2.Qxa5#
- 1...Sc4+
- 2.bxc4#
- 1...Sxb3
- 2.Qxb3#
- 1...Rc7
- 2.Be6#
- 1...Sc6
- 2.b4#
- 1...Sd3!
- threat
- 1.fxe8R?
- threat
- 2.Qxa5#
- 1...Sc4+
- 2.bxc4#
- 1...Sxb3
- 2.Qxb3#
- 1...Rc7
- 2.Be6#
- 1...Sc6
- 2.b4#
- 1...Sd3!
- threat
- 1.Sc2?
- Keys
- 1.Sf5!
- threat
- 2.Sxe7#
- 1...Bxe3+
- 2.Sxe3#
- 1...Sc4+
- 2.bxc4#
- 1...Rxf7
- 2.Be6#
- 1...Sxb3
- 2.Qxb3#
- 1...Re5
- 2.Rxd6#
- 1...Re6
- 2.Bxe6#
- 1...Rc7
- 2.Be6#
- 1...Rd7
- 2.Qxa5#
- 1...Bg5
- 2.Rxd6#
- 1...Sc6
- 2.b4#
- threat
- 1.Sf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- R(j);N_GUARD::B(I),XR(j)
- R(j);N_GUARD::B(I)
- R(j);S_CUTB(k)::QAR(A),XS(e)
- R(j);N_GUARD,XP(G)::B(I)
- B(k);N_GUARD,XP(G)::QAR(A),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);N_GUARD::QAB(A)+P(B)
- Tries
- Try
- S(D);
- Threat
- S(D)
- Vars
- B(d);CHECK,XP(C)::S(D),XB(d)
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- S(e);N_GUARD::QAB(A)+P(B)
- Refutation
- S(a);
- Try
- B(I);CHECK,XP(i)
- Vars
- B(k);P_SPINB(k)::QAR(A),XS(e)
- S(e);XB(I)::QAB(A)+P(B)
- Refutation
- R(j);CHECK,XB(I)
- Try
- P(B);CHECK
- Vars
- S(e);N_GUARD,P_SPINS(e)::QAB(A),XS(e)
- Refutation
- S(e);CHECK,P_SPINS(e)
- Try
- P(G);XB(k)
- Threat
- QAR(A),XS(e)
- Vars
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- S(e);N_GUARD::QAB(A)+P(B)
- Refutation
- S(a);
- Try
- P(G);XB(k)
- Threat
- QAR(A),XS(e)
- Vars
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- S(e);N_GUARD::QAB(A)+P(B)
- Refutation
- S(a);
- Try
- P(G);XB(k)
- Threat
- QAR(A),XS(e)
- Vars
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- R(j);N_GUARD::B(I)
- S(e);N_GUARD::QAB(A)+P(B)
- Refutation
- S(a);
- Try
- P(G);XB(k)
- Threat
- QAR(A),XS(e)
- Vars
- S(e);CHECK,OGATE::P(B),XS(e)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- R(j);N_GUARD::B(I)
- S(e);N_GUARD::QAB(A)+P(B)
- Refutation
- S(a);
- Try
- Actual
- S(D);
- Threat
- S(D),XR(j)
- Vars
- B(d);CHECK,XP(C)::S(D),XB(d)
- S(e);CHECK,OGATE::P(B),XS(e)
- R(j);N_GUARD,XP(G)::B(I)
- S(e);OGATE,P_SPINS(e),XP(B)::QAB(A),XS(e)
- R(j);S_CUTB(d)::R1(F),XP(h)
- R(j);N_GUARD::B(I),XR(j)
- R(j);N_GUARD::B(I)
- R(j);S_CUTB(k)::QAR(A),XS(e)
- B(d);N_GUARD::R1(F),XP(h)
- S(e);N_GUARD::QAB(A)+P(B)
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).