MESON Chess Problem Database
Problem Display
PID: 225835 (3B4/2b5/2K1p3/4k1Nn/2R4N/5rp1/4Pr2/1b3Q2 w - - 0 1)
Belik, Nikolai Ivanovich
2nd HM., Praca, 1958
#2
7 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxe2
- 2.Sgxf3#
- 1...Rg2
- 2.Sgxf3#
- 1...Rh2
- 2.Sgxf3#
- 1...Rd3
- 2.Re4#
- 1...Rf5
- 2.Sg6#
- 1...Rf6
- 2.Bxc7#
- 1...Ba2
- 2.Re4#
- 1...Bd3
- 2.Qa1#
- 1...Be4+
- 2.Rxe4#
- 1...Bf5
- 2.Sf7#
- 1...Sf4
- 2.Sf7#
- 1...Sf6
- 2.Sf7#
- 2.Bxc7#
- 1...Rxe2
- Tries
- 1.Shxf3+?
- 1...Kf5
- 2.Qxb1#
- 1...Rxf3!
- 1...Kf5
- 1.Qh3?
- threat
- 2.Qxe6#
- 1...Be4+
- 2.Rxe4#
- 1...Rf5
- 2.Sg6#
- 1...Rf6
- 2.Bxc7#
- 1...Bf5
- 2.Sf7#
- 1...Sf4
- 2.Sf7#
- 1...Sg7!
- threat
- 1.Qxb1?
- threat
- 2.Sg6#
- 2.Re4#
- 2.Qe4#
- 2.Qb5#
- 1...Rxe2
- 2.Shxf3#
- 2.Sg6#
- 2.Sgxf3#
- 2.Qb5#
- 1...Rb3
- 2.Sg6#
- 2.Re4#
- 2.Qe4#
- 1...Rc3
- 2.Sg6#
- 2.Qe4#
- 2.Qb5#
- 1...Rd3
- 2.Re4#
- 1...Re3
- 2.Sg6#
- 2.Qb5#
- 1...Rf4
- 2.Sg6#
- 2.Qb5#
- 1...Rf6
- 2.Bxc7#
- 2.Re4#
- 2.Qe4#
- 2.Qa1#
- 2.Qb2#
- 2.Qb5#
- 1...Bb6
- 2.Sg6#
- 2.Re4#
- 2.Qe4#
- 1...Bd6
- 2.Sg6#
- 2.Re4#
- 2.Qe4#
- 1...Sf4
- 2.Sf7#
- 2.Re4#
- 2.Qe4#
- 1...Sf6
- 2.Sg6#
- 2.Sf7#
- 2.Bxc7#
- 1...Bxd8!
- threat
- 1.Qxf2?
- threat
- 2.Sgxf3#
- 2.Qd4#
- 2.Qc5#
- 1...Be4+
- 2.Rxe4#
- 1...Bxd8
- 2.Qd4#
- 1...gxf2
- 2.Sgxf3#
- 1...Ra3
- 2.Sf7#
- 2.Bxc7#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Rb3
- 2.Sf7#
- 2.Bxc7#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Rc3
- 2.Sf7#
- 2.Bxc7#
- 2.Qd4#
- 2.Qc5#
- 1...Rd3
- 2.Sg6#
- 2.Sf7#
- 2.Re4#
- 1...Re3
- 2.Sf7#
- 2.Bxc7#
- 1...Rf4
- 2.Rc5#
- 2.Qc5#
- 1...Rf5
- 2.Sg6#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Rf6
- 2.Bxc7#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Rf7
- 2.Sxf7#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Rf8
- 2.Bxc7#
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Bb6
- 2.Sgxf3#
- 1...Bd6
- 2.Sgxf3#
- 2.Qd4#
- 1...Sf4
- 2.Sgxf3#
- 2.Sf7#
- 2.Qd4#
- 1...Sf6
- 2.Sgxf3#
- 2.Sf7#
- 2.Bxc7#
- 2.Qd4#
- 1...Rxf2!
- threat
- 1.Shxf3+?
- Keys
- 1.Qd1!
- threat
- 2.Qd4#
- 1...Be4+
- 2.Rxe4#
- 1...Rd3
- 2.Re4#
- 1...Rf4
- 2.Rc5#
- 1...Bd3
- 2.Qa1#
- 1...Bb6
- 2.Qd6#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- R(b);N_GUARD,XP(B)::S(E),XR(c)
- R(b);N_GUARD::S(E),XR(c)
- R(c);S_CUTB(a)::R1(C)
- R(c);SBLOCK,S_CUTB(a)::S(D)
- R(c);SBLOCK::B(G),XB(h)
- B(a);N_GUARD::R1(C)
- B(a);OGATE::QAB(A)
- B(a);CHECK,N_GUARD::R1(C),XB(a)
- B(a);S_CUTR(c)::S(E)
- S(f);S_CUTR(c)::S(E)
- Tries
- Try
- S(D);CHECK,XR(c)
- Vars
- K(e);P-FLIGHT::QAB(A),XB(a)
- Refutation
- R(b);XS(D)
- Try
- Q(A);
- Threat
- QAR1(A),XP(g)
- Vars
- B(a);CHECK,N_GUARD::R1(C),XB(a)
- R(c);S_CUTB(a)::S(D)
- R(c);SBLOCK::B(G),XB(h)
- B(a);S_CUTR(c)::S(E)
- S(f);S_CUTR(c)::S(E)
- Refutation
- S(f);
- Try
- Q(A);XB(a)
- Threat
- DUALS(4)
- Vars
- R(c);::R1(C)
- Refutation
- B(h);XB(G)
- Try
- Q(A);XR(b)
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,N_GUARD::R1(C),XB(a)
- B(h);XB(G)::QAB1(A)
- P(d);XQ(A)::S(E),XR(c)
- B(h);::S(E),XR(c)
- Refutation
- R(c);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A)
- Vars
- B(a);CHECK,N_GUARD::R1(C),XB(a)
- R(c);S_CUTB(a)::R1(C)
- R(c);SBLOCK::R(C)
- B(a);OGATE::QAB(A)
- B(h);N_GUARD::QAB1(A)
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).