MESON Chess Problem Database
Problem Display
PID: 114272 (5q2/4pPBB/r1P1K2N/2p1N1p1/2pk4/1p5R/r1nn3p/1Q6 w - - 0 1)
Azerbajevs, Erkoli
Latvian Championship, 1955
#2
9 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxf7+
- 2.Sexf7#
- 1...Qa8
- 2.Sd3#
- 2.Seg4#
- 2.Sd7#
- 1...Qc8+
- 2.Sd7#
- 1...Qd8
- 2.Sd3#
- 2.Seg4#
- 2.Sd7#
- 1...Qe8
- 2.Sd3#
- 2.Seg4#
- 2.Sd7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Sa1
- 2.Sf5#
- 1...Se1
- 2.Sf5#
- 1...Sa3
- 2.Sf5#
- 1...Se3
- 2.Sf3#
- 1...Sb4
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 1...c3
- 2.Rd3#
- 1...Qxf7+
- Tries
- 1.Qe1?
- threat
- 2.Sf3#
- 2.Sf5#
- 2.Qxd2#
- 1...Qxf7+
- 2.Sexf7#
- 1...Qc8+
- 2.Sd7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Qxg7
- 2.Sf5#
- 2.Qxd2#
- 1...Se3
- 2.Sf3#
- 2.Qxe3#
- 1...Sa1
- 2.Sf3#
- 2.Sf5#
- 2.Qf2#
- 2.Qe3#
- 1...Sa3
- 2.Sf3#
- 2.Sf5#
- 2.Qf2#
- 2.Qe3#
- 1...Sb4
- 2.Sf3#
- 2.Sf5#
- 2.Qf2#
- 2.Qe3#
- 1...Sb1
- 2.Sf3#
- 2.Sf5#
- 2.Qe4#
- 1...Sf1
- 2.Sf3#
- 2.Sf5#
- 2.Qc3#
- 2.Qe4#
- 1...Sf3
- 2.Sxf3#
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 2.Qxe4#
- 1...c3
- 2.Sf5#
- 2.Rd3#
- 1...Sxe1!
- threat
- 1.Qh1?
- threat
- 2.Sf5#
- 2.Qd5#
- 1...Qxf7+
- 2.Sexf7#
- 1...Qc8+
- 2.Sd7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Se3
- 2.Sf3#
- 1...Qd8
- 2.Sd3#
- 2.Seg4#
- 2.Sg6#
- 2.Sd7#
- 2.Sf5#
- 1...Sb4
- 2.Sf5#
- 1...Se4
- 2.Sf5#
- 2.Qxe4#
- 1...Sf3!
- threat
- 1.Qb2+?
- 1...c3
- 2.Rd3#
- 2.Qxc3#
- 1...Rxb2!
- 1...c3
- 1.Qxb3?
- threat
- 2.Sf3#
- 2.Qc3#
- 1...Qxf7+
- 2.Sexf7#
- 1...Qc8+
- 2.Sd7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Qxg7
- 2.Qc3#
- 1...cxb3
- 2.Rd3#
- 1...R2a3
- 2.Sf3#
- 1...R6a3
- 2.Sf3#
- 1...Se3
- 2.Sf3#
- 2.Qxe3#
- 1...Sb1
- 2.Sf3#
- 2.Qxc4#
- 1...Sf3
- 2.Sxf3#
- 1...Se4
- 2.Sf3#
- 2.Sf5#
- 2.Qxc4#
- 1...c3
- 2.Rd3#
- 2.Qd5#
- 2.Qxc3#
- 1...Sxb3!
- threat
- 1.Qe1?
- Keys
- 1.Qc1!
- threat
- 2.Qxd2#
- 1...Qxf7+
- 2.Sexf7#
- 1...Qc8+
- 2.Sd7#
- 1...Rxc6+
- 2.Sxc6#
- 1...Sf3
- 2.Sxf3#
- 1...Sa1
- 2.Qc3#
- 1...Se1
- 2.Qc3#
- 1...Sa3
- 2.Qc3#
- 1...Se3
- 2.Sf3#
- 1...Sb4
- 2.Qc3#
- 1...Sb1
- 2.Sf3#
- 1...Sf1
- 2.Sf3#
- 1...Se4
- 2.Sf5#
- 1...c3
- 2.Rd3#
- threat
- 1.Qc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(l);CHECK,XP(G)::B(H)+S(C),XQ(l)
- Q(l);CHECK,N_GUARD::B(H)+S(C)
- R(j);CHECK,XP(D)::B(H)+S(C),DCHECK,XR(j)
- S(b);::S(F)
- S(b);SBLOCK::B(H)+S(C),DCHECK
- S(c);SBLOCK::S(F)
- P(f);N_GUARD::R1(B)
- Tries
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- Q(l);CHECK,XP(G)::B(H)+S(C),XQ(l)
- Q(l);CHECK,N_GUARD::B(H)+S(C)
- R(j);CHECK,XP(D)::B(H)+S(C),DCHECK,XR(j)
- Refutation
- S(b);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(l);CHECK,XP(G)::B(H)+S(C),XQ(l)
- Q(l);CHECK,N_GUARD::B(H)+S(C)
- R(j);CHECK,XP(D)::B(H)+S(C),DCHECK,XR(j)
- S(b);SBLOCK::B(H)+S(C),DCHECK
- S(b);::S(F)
- Refutation
- S(c);
- Try
- Q(A);CHECK
- Refutation
- R(a);XQ(A)
- Try
- Q(A);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(l);CHECK,XP(G)::B(H)+S(C),XQ(l)
- Q(l);CHECK,N_GUARD::B(H)+S(C)
- R(j);CHECK,XP(D)::B(H)+S(C),DCHECK,XR(j)
- Q(l);XB(H)::QAB1(A)
- P(f);N_GUARD,XQ(A)::R1(B)
- R(a);::B(H)+S(C),DCHECK
- R(j);N_PINP(D)::B(H)+S(C),DCHECK
- S(c);::B(H)+S(C),DCHECK,XS(c)
- Refutation
- S(c);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAR2(A),XS(c)
- Vars
- Q(l);CHECK,XP(G)::B(H)+S(C),XQ(l)
- Q(l);CHECK,N_GUARD::B(H)+S(C)
- R(j);CHECK,XP(D)::B(H)+S(C),DCHECK,XR(j)
- S(c);::B(H)+S(C),DCHECK,XS(c)
- S(b);OGATE::QAB1(A)
- S(b);SBLOCK::B(H)+S(C),DCHECK
- S(c);::B(H)+S(C),DCHECK
- S(c);SBLOCK::S(F)
- P(f);N_GUARD::R1(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).