MESON Chess Problem Database
Problem Display
PID: 273 (2rN2BK/4q1p1/4n2b/R7/2pkN3/3n4/1P2Q2B/1b2Rr2 w - - 0 1)
Birbrager, Isaak S
2nd Prize, Trud, 1950
#2
9 + 10
| 3147 | Chess Problems: Introduction to an Art | 1963 |
| 3105 | FIDE Album (1945-1955) | 1964 |
| 56 | The Problemist | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxe6#
- 1...Qb4
- 2.Sxe6#
- 1...Qh4
- 2.Sxe6#
- 1...Qg5
- 2.Sxe6#
- 1...Qf8
- 2.Sxe6#
- 1...Qa7
- 2.Sxe6#
- 1...Qb7
- 2.Sxe6#
- 1...Qc7
- 2.Sxe6#
- 1...Rf4
- 2.Qe3#
- 1...Rc6
- 2.Sxc6#
- 1...Ra8
- 2.Sc6#
- 1...Rb8
- 2.Sc6#
- 1...Be3
- 2.Qxe3#
- 1...Sc1
- 2.Be5#
- 1...Sxe1
- 2.Be5#
- 1...Sxb2
- 2.Be5#
- 1...Sf2
- 2.Be5#
- 1...Sb4
- 2.Be5#
- 1...Sdf4
- 2.Qe3#
- 1...Se5
- 2.Bxe5#
- 1...Sef4
- 2.Qe3#
- 1...Sg5
- 2.Rd5#
- 2.Qe3#
- 1...Sc7
- 2.Sc6#
- 1...Sxd8
- 2.Rd5#
- 1...Sf8
- 2.Rd5#
- 1...g5
- 2.Qe3#
- 1...Qa3
- Tries
- 1.Sc3?
- threat
- 2.Rd5#
- 2.Qe4#
- 1...Qxd8
- 2.Qe4#
- 1...Rxe1
- 2.Rd5#
- 1...Rxd8
- 2.Qe4#
- 1...Sxe1
- 2.Be5#
- 2.Rd5#
- 1...Sxb2
- 2.Be5#
- 1...Sxd8
- 2.Rd5#
- 1...Qh4
- 2.Sxe6#
- 2.Rd5#
- 1...Qc5
- 2.Sxe6#
- 2.Qe4#
- 1...Qg5
- 2.Sxe6#
- 2.Qe4#
- 1...Qd6
- 2.Qe4#
- 1...Qb7
- 2.Sxe6#
- 1...Qd7
- 2.Qe4#
- 1...Rf4
- 2.Rd5#
- 2.Qe3#
- 1...Rf5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Be3
- 2.Rd5#
- 2.Qxe3#
- 1...Sc1
- 2.Be5#
- 2.Rd5#
- 1...Sf2
- 2.Be5#
- 2.Rd5#
- 1...Sb4
- 2.Be5#
- 1...Sdf4
- 2.Qe3#
- 1...Sdc5
- 2.Be5#
- 1...Se5
- 2.Bxe5#
- 2.Rd5#
- 1...Sec5
- 2.Sb5#
- 1...Sg5
- 2.Rd5#
- 1...Sc7
- 2.Sc6#
- 1...Sf8
- 2.Rd5#
- 1...Sef4!
- threat
- 1.Sc3?
- Keys
- 1.Sd6!
- threat
- 2.Qe4#
- 1...Rxe1
- 2.Sf5#
- 1...Sxe1
- 2.Be5#
- 1...Sxb2
- 2.Be5#
- 1...Sxd8
- 2.Rd5#
- 1...Sdc5
- 2.Qxc4#
- 1...Sef4
- 2.Sf5#
- 1...Qh4
- 2.Sxe6#
- 1...Qb7
- 2.Sxe6#
- 1...Rf4
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sc1
- 2.Be5#
- 1...Sf2
- 2.Be5#
- 1...Sb4
- 2.Be5#
- 1...Sdf4
- 2.Qe3#
- 1...Se5
- 2.Bxe5#
- 1...Sec5
- 2.Sb5#
- 1...Sg5
- 2.Rd5#
- 1...Sc7
- 2.Sc6#
- 1...Sf8
- 2.Rd5#
- threat
- 1.Sd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 10
- Sets
- Q(h);N_GUARD::S(G),XS(f)
- Q(h);N_GUARD,P_PINB(H)::S(G),XS(f)
- R(b);S_CUTB(g)::QAB1(C)
- R(j);N_GUARD::S(G),XR(j)
- R(j);N_GUARD::S(G)
- B(g);N_GUARD::QAB1(C),XB(g)
- S(c);N_GUARD::B(D)
- S(c);N_GUARD,XR(A)::B(D)
- S(c);N_GUARD,XP(B)::B(D)
- S(c);S_CUTB(g)::QAB1(C)
- S(c);N_GUARD::B(D),XS(c)
- S(f);S_CUTB(g)::QAB1(C)
- S(f);S_CUTR(j)::S(G)
- S(f);XS(G)::R1(F)
- S(f);::R1(F)
- P(i);S_CUTB(g)::QAB1(C)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(h);P_PINB(H),XS(G)::QAR1(C)
- R(b);XR(A)::R1(F)
- R(j);P_PINB(H),XS(G)::QAR1(C)
- S(c);N_GUARD,XP(B)::B(D)
- S(f);XS(G)::R1(F)
- Q(h);::QAR1(C)
- Q(h);N_GUARD::S(G),XS(f)
- R(b);::QAR1(C)
- R(j);::QAR1(C)
- S(c);N_GUARD::B(D)
- S(c);S_CUTB(g)::QAB1(C)
- S(f);SBLOCK::S(E)
- S(f);::R1(F)
- S(f);S_CUTR(j)::S(G)
- Refutation
- S(f);
- Try
- Actual
- S(E);
- Threat
- QAR1(C)
- Vars
- R(b);N_GUARD,XR(A)::S(E)
- S(c);N_GUARD,XR(A)::B(D)
- S(c);N_GUARD,XP(B)::B(D)
- S(f);XS(G)::R1(F)
- S(c);OGATE::QAR1(C),XP(d)
- S(f);S_CUTR(b)::S(E)
- Q(h);N_GUARD::S(G),XS(f)
- R(b);S_CUTB(g)::QAB1(C)
- B(g);N_GUARD::QAB1(C),XB(g)
- S(c);N_GUARD::B(D)
- S(c);S_CUTB(g)::QAB1(C)
- S(c);N_GUARD::B(D),XS(c)
- S(f);SBLOCK::S(E)
- S(f);::R1(F)
- S(f);S_CUTR(j)::S(G)
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).