MESON Chess Problem Database
Problem Display
PID: 6680 (2q5/1B1P1n2/1r3p2/2b3Np/Qnrk1B2/R4P2/1P1N3K/1b2R3 w - - 0 1)
Kofman, Rafael Moiseevich
4th Prize, Smena, 1932
#2
11 + 10
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
SOLUTION
- SOUND
- Sets
- 1...Rc2
- 2.Re4#
- 1...Rb5
- 2.Se6#
- 1...Re6
- 2.Sxe6#
- 1...Ba2
- 2.Re4#
- 1...Bd3
- 2.Sb3#
- 1...Be4
- 2.Rxe4#
- 1...Bd6
- 2.Se6#
- 1...Sa2
- 2.Qxc4#
- 1...Sc2
- 2.Re4#
- 2.Qxc4#
- 1...Sd3
- 2.Re4#
- 2.Qxc4#
- 1...Sd5
- 2.Qxc4#
- 1...Sa6
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Se5
- 2.Be3#
- 1...Sd6
- 2.Se6#
- 1...Rc2
- Tries
- 1.Rd3+?
- 1...Bxd3
- 2.Sb3#
- 1...Sxd3
- 2.Re4#
- 2.Qxc4#
- 1...Kxd3!
- 1...Bxd3
- 1.Qc2?
- threat
- 2.Sb3#
- 2.Re4#
- 2.Qxc4#
- 1...Qxb7
- 2.Qxc4#
- 1...Rxc2
- 2.Re4#
- 1...Rxb7
- 2.Qxc4#
- 1...Sxc2
- 2.Re4#
- 1...Sxg5
- 2.Sb3#
- 2.Qxc4#
- 1...Qc6
- 2.Qxc4#
- 1...Rc6
- 2.Qxc4#
- 1...Bd6
- 2.Sb3#
- 2.Se6#
- 1...Be7
- 2.Sb3#
- 1...Bf8
- 2.Sb3#
- 1...Sc6
- 2.Rd3#
- 2.Qxc4#
- 1...Qe8
- 2.Sb3#
- 2.Qxc4#
- 1...Rc3
- 2.Re4#
- 2.Qxc3#
- 2.bxc3#
- 1...Re6
- 2.Sb3#
- 2.Sxe6#
- 2.Qxc4#
- 1...Ba2
- 2.Re4#
- 2.Qe4#
- 1...Sa2
- 2.Re4#
- 2.Rd3#
- 2.Qxc4#
- 1...Sd3
- 2.Re4#
- 2.Rxd3#
- 2.Qxc4#
- 1...Sd5
- 2.Re4#
- 2.Rd3#
- 2.Qxc4#
- 1...Sa6
- 2.Re4#
- 2.Rd3#
- 2.Qxc4#
- 1...Se5
- 2.Sb3#
- 2.Be3#
- 2.Re4#
- 1...Sd6
- 2.Sb3#
- 2.Se6#
- 1...f5
- 2.Sb3#
- 2.Qxc4#
- 1...Bxc2!
- threat
- 1.Qb3?
- threat
- 2.Qxc4#
- 2.Qe3#
- 1...Qxb7
- 2.Qxc4#
- 1...Rxb7
- 2.Qxc4#
- 1...Qc6
- 2.Qxc4#
- 1...Rc3
- 2.Qxc3#
- 1...Rc6
- 2.Qxc4#
- 1...Bd6
- 2.Se6#
- 2.Qe3#
- 1...Be7
- 2.Qe3#
- 1...Bf8
- 2.Qe3#
- 1...Sc6
- 2.Qxc4#
- 1...Rc1
- 2.Qe3#
- 1...Qe8
- 2.Qxc4#
- 1...Rc2
- 2.Re4#
- 2.Qe3#
- 1...Re6
- 2.Sxe6#
- 2.Qxc4#
- 1...Ba2
- 2.Re4#
- 2.Qe3#
- 1...Sc2
- 2.Re4#
- 2.Qxc4#
- 2.Qd3#
- 1...Sd3
- 2.Re4#
- 2.Qxc4#
- 1...Sd5
- 2.Qxc4#
- 1...Se5
- 2.Be3#
- 2.Qe3#
- 1...Sd6
- 2.Se6#
- 2.Qe3#
- 1...Bd3!
- threat
- 1.Rd3+?
- Keys
- 1.Qb5!
- threat
- 2.Qxc4#
- 1...Rxb5
- 2.Se6#
- 1...Rc1
- 2.Sb3#
- 1...Rc2
- 2.Re4#
- 1...Rc3
- 2.bxc3#
- 1...Ba2
- 2.Re4#
- 1...Bd3
- 2.Sb3#
- 1...Bd6
- 2.Se6#
- 1...Be7
- 2.Be3#
- 1...Bf8
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sd6
- 2.Se6#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 6
- Sets
- R(c);P_PINS(C),P_SPINS(b),S_CUTB(a)::R1(A)
- R(g);N_GUARD::S(I)
- R(g);N_GUARD::S(I),XR(g)
- B(a);N_GUARD::R1(A)
- B(a);SBLOCK::S(C)
- B(a);N_GUARD::R1(A),XB(a)
- B(e);P_PINB(H),S_CUTR(g)::S(I)
- S(b);OGATE,P_SPINR(c)::QAR1(G),XR(c)
- S(i);SBLOCK::B(H)
- S(i);S_CUTR(g)::S(I)
- Tries
- Try
- R(E);CHECK
- Vars
- B(a);SBLOCK,XR(E)::S(C)
- Refutation
- K(d);P-FLIGHT,XR(E)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(j);XB(J)::QAR1(G),XR(c)
- R(c);P_PINS(C),XQ(G)::R1(A)
- R(g);XB(J)::QAR1(G),XR(c)
- S(b);XQ(G)::R1(A)
- Q(j);::QAR1(G),XR(c)
- R(g);::QAR1(G),XR(c)
- B(e);::S(C)
- Refutation
- B(a);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(j);XB(J)::QAR1(G),XR(c)
- R(g);XB(J)::QAR1(G),XR(c)
- Q(j);::QAR1(G),XR(c)
- R(c);N_GUARD::QAB1(G),XR(c)
- R(g);::QAR1(G),XR(c)
- B(e);::QAB1(G)
- S(b);::QAR1(G),XR(c)
- R(c);::QAB1(G)
- Refutation
- B(a);
- Try
- Actual
- Q(G);
- Threat
- QAR1(G),XR(c)
- Vars
- R(g);N_GUARD,XQ(G)::S(I)
- R(c);::S(C)
- R(c);P_PINS(C),S_CUTB(a)::R1(A)
- R(c);OGATE::P(B),XR(c)
- B(a);N_GUARD::R1(A)
- B(a);SBLOCK::S(C)
- B(e);P_PINB(H),S_CUTR(g)::S(I)
- B(e);::B(H)
- S(i);SBLOCK::B(H)
- S(i);S_CUTR(g)::S(I)
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).