MESON Chess Problem Database
Problem Display
PID: 63260 (4q3/5ppp/2p3Qb/1pR3n1/1P1k1B2/p5Np/6b1/2KNnB2 w - - 0 1)
Boyer, Jean-Pierre
Europe Echecs, 1965
#2
8 + 13
SOLUTION
- SOUND
- Sets
- 1...Qd7
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qe2
- 2.Sxe2#
- 1...Qe3+
- 2.Bxe3#
- 1...Qe5
- 2.Bxe5#
- 1...Qa8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qb8
- 2.Se2#
- 2.Be3#
- 1...Qc8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qd8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qf8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qg8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Qh8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 1...Bxf1
- 2.Qd6#
- 1...Be4
- 2.Be3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3+
- 2.Qxd3#
- 1...Sef3
- 2.Qd3#
- 2.Qd6#
- 1...Sgf3
- 2.Qd6#
- 1...Se4
- 2.Sf5#
- 1...Se6
- 2.Se2#
- 1...Qd7
- Tries
- 1.Rc4+?
- 1...Kd5
- 2.Sc3#
- 2.Qd6#
- 1...bxc4!
- 1...Kd5
- 1.Rd5+?
- 1...Kxd5
- 2.Qd6#
- 1...cxd5
- 2.Qb6#
- 1...Bxd5!
- 1...Kxd5
- 1.Qb1?
- threat
- 2.Sf5#
- 2.Qa1#
- 1...Qe3+
- 2.Bxe3#
- 1...Sd3+
- 2.Qxd3#
- 1...Bxf1
- 2.Sf5#
- 1...Qd7
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 2.Qa1#
- 1...Qe2
- 2.Sxe2#
- 2.Sf5#
- 1...Qe4
- 2.Qa1#
- 1...Qe5
- 2.Bxe5#
- 2.Qa1#
- 1...Qe6
- 2.Qa1#
- 1...Qc8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 2.Qa1#
- 1...Be4
- 2.Se2#
- 2.Be3#
- 2.Qa1#
- 1...Se4
- 2.Se2#
- 2.Sf5#
- 1...f5
- 2.Sxf5#
- 2.Qa1#
- 1...g6
- 2.Qa1#
- 1...Sc2!
- threat
- 1.Qc2?
- threat
- 2.Sf5#
- 2.Qc3#
- 1...Qe3+
- 2.Bxe3#
- 1...Sd3+
- 2.Qxd3#
- 1...Qd7
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 2.Qf2#
- 2.Qc3#
- 1...Qe4
- 2.Qc3#
- 1...Qe5
- 2.Bxe5#
- 2.Qc3#
- 1...Qe6
- 2.Qc3#
- 1...Qc8
- 2.Se2#
- 2.Be3#
- 2.Be5#
- 2.Qf2#
- 2.Qc3#
- 1...Be4
- 2.Se2#
- 2.Be3#
- 2.Qf2#
- 2.Qc3#
- 1...Se4
- 2.Se2#
- 2.Sf5#
- 1...f5
- 2.Sxf5#
- 2.Qc3#
- 1...g6
- 2.Qc3#
- 1...Sxc2!
- threat
- 1.Qe4+?
- 1...Bxe4
- 2.Be3#
- 1...Sxe4
- 2.Sf5#
- 1...Qxe4!
- 1...Bxe4
- 1.Qf6+?
- 1...Qe5
- 2.Be3#
- 2.Bxe5#
- 2.Qxe5#
- 1...gxf6!
- 1...Qe5
- 1.Rc4+?
- Keys
- 1.Bd2!
- threat
- 2.Bc3#
- 1...Sd3+
- 2.Qxd3#
- 1...Qe3
- 2.Bxe3#
- 1...Sgf3
- 2.Qd6#
- 1...Se4
- 2.Sf5#
- 1...Se6
- 2.Se2#
- threat
- 1.Bd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- Q(m);N_GUARD::S(D),XQ(m)
- Q(m);CHECK,N_GUARD::B(F),XQ(m)
- Q(m);N_GUARD::B(F),XQ(m)
- B(b);N_GUARD,XB(C)::QAR2(H)
- B(b);S_CUTQ(m)::B(F)
- S(a);N_GUARD::QAR1(H)
- S(a);CHECK,N_GUARD::QAR1(H),XS(a)
- S(g);P_PINB(F),S_CUTB(b)::QAR2(H)
- S(g);P_PINB(F),SBLOCK::S(D)
- S(g);P_PINB(F),S_CUTQ(m)::S(D)
- Tries
- Try
- R(G);CHECK
- Refutation
- P(f);XR(G)
- Try
- R(G);CHECK
- Vars
- K(e);P-FLIGHT,XR(G)::QAR1(H)
- P(h);OGATE,SBLOCK,XR(G)::QAB(H)
- Refutation
- B(b);XR(G)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(m);CHECK,N_GUARD::B(F),XQ(m)
- S(a);CHECK,N_GUARD::QAR1(H),XS(a)
- B(b);XB(C)::S(D)
- Q(m);::QAB(H)
- P(k);::QAB(H)
- Refutation
- S(a);
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(m);CHECK,N_GUARD::B(F),XQ(m)
- S(a);CHECK,N_GUARD::QAR1(H),XS(a)
- Q(m);::QAB1(H)
- P(k);::QAB1(H)
- Refutation
- S(a);XQ(H)
- Try
- Q(H);CHECK
- Vars
- B(b);XQ(H)::B(F)
- S(g);P_PINB(F),SBLOCK,XQ(H)::S(D)
- Refutation
- Q(m);XQ(H)
- Try
- Q(H);CHECK
- Refutation
- P(k);XQ(H)
- Try
- Actual
- B(F);
- Threat
- B(F)
- Vars
- S(a);CHECK,N_GUARD::QAR1(H),XS(a)
- Q(m);N_GUARD,P_PINB(F)::B(F),XQ(m)
- S(g);P_PINB(F),S_CUTB(b)::QAR2(H)
- S(g);P_PINB(F),SBLOCK::S(D)
- S(g);P_PINB(F),S_CUTQ(m)::S(D)
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).