MESON Chess Problem Database
Problem Display
PID: 238004 (1q6/bpQB1p2/5Nb1/4n1r1/R3pkPP/R5N1/3rP1Kn/B7 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
Revista Romana de Sah, 1973
#2
11 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Sd5#
- 1...Rb2
- 2.Sd5#
- 1...Rc2
- 2.Sd5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Rd4
- 2.e3#
- 1...Rd5
- 2.Sxd5#
- 1...Rxg4
- 2.Bxe5#
- 1...Rf5
- 2.Rxe4#
- 1...Bf5
- 2.Bxe5#
- 1...Bh5
- 2.Rxe4#
- 1...Bd4
- 2.Sd5#
- 1...Sf1
- 2.Rf3#
- 1...Sf3
- 2.Rxf3#
- 1...Sxg4
- 2.Rf3#
- 1...Ra2
- Tries
- 1.Sgh5+?
- 1...Bxh5
- 2.Rxe4#
- 1...Rxh5!
- 1...Bxh5
- 1.Sfh5+?
- 1...Bxh5
- 2.Rxe4#
- 1...Rxh5!
- 1...Bxh5
- 1.Bd4?
- threat
- 2.Sd5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Rxd4
- 2.e3#
- 1...Bf5
- 2.Bxe5#
- 1...Rf5!
- threat
- 1.Rd3?
- threat
- 2.Sd5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Rf5
- 2.Rxe4#
- 1...Bf5
- 2.Bxe5#
- 1...Rxd3!
- threat
- 1.Rd4?
- threat
- 2.Sd5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Rxd4
- 2.e3#
- 1...Rf5
- 2.Rxe4#
- 1...Bf5!
- threat
- 1.Sgh5+?
- Keys
- 1.Bf5!
- threat
- 2.Bxe5#
- 2.Rxe4#
- 1...Rxe2+
- 2.Sxe2#
- 1...Qxc7
- 2.Rxe4#
- 1...Rxf5
- 2.Rxe4#
- 1...Bxf5
- 2.Bxe5#
- 1...Sxg4
- 2.Rf3#
- 2.Rxe4#
- 1...Rd3
- 2.Rxe4#
- 1...Qe8
- 2.Rxe4#
- 1...Rb2
- 2.Sd5#
- 2.Rxe4#
- 1...Rd4
- 2.e3#
- 1...Rd5
- 2.Sxd5#
- 2.Rxe4#
- 1...Rd6
- 2.Rxe4#
- 1...Bd4
- 2.Sd5#
- 1...Sf3
- 2.Rxf3#
- 2.Rxe4#
- threat
- 1.Bf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 9
- Sets
- R(a);N_GUARD::S(I)
- R(a);CHECK,XP(B)::S(E),XR(a)
- R(a);N_PINP(B),N_SPINP(c)::P(B)
- R(a);N_GUARD,N_PINP(B)::S(I),XR(a)
- R(f);N_GUARD,P_PINS(E),XP(G)::B(A),XS(e)
- R(f);S_CUTB(g)::R1(F),XP(c)
- B(g);S_CUTR(f)::B(A),XS(e)
- B(g);N_GUARD::R1(F),XP(c)
- B(h);N_SPINP(c),S_CUTR(a)::S(I)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD,XP(G)::R1(D)
- Tries
- Try
- S(E);CHECK
- Vars
- B(g);XS(E)::R1(F),XP(c)
- Refutation
- R(f);XS(E)
- Try
- S(I);CHECK
- Vars
- B(g);XS(I)::R1(F),XP(c)
- Refutation
- R(f);XS(I)
- Try
- B(A);N_PINP(c)
- Threat
- S(I)
- Vars
- R(a);CHECK,XP(B)::S(E),XR(a)
- R(a);N_PINP(B),XB(A)::P(B)
- B(g);S_CUTR(f)::B(A),XS(e)
- Refutation
- R(f);
- Try
- R(D);
- Threat
- S(I)
- Vars
- R(a);CHECK,XP(B)::S(E),XR(a)
- R(f);S_CUTB(g)::R1(F),XP(c)
- B(g);S_CUTR(f)::B(A),XS(e)
- Refutation
- R(a);N_PINP(B),XR(D)
- Try
- R(F);
- Threat
- S(I)
- Vars
- R(a);CHECK,XP(B)::S(E),XR(a)
- R(a);N_PINP(B),N_SPINP(c),XR(F)::P(B)
- R(f);S_CUTB(g)::R1(F),XP(c)
- Refutation
- B(g);
- Try
- Actual
- B(K);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,XP(B)::S(E),XR(a)
- Q(k);N_SPINS(e),XQ(J)::R1(F),XP(c)
- R(f);XB(K)::R1(F),XP(c)
- B(g);XB(K)::B(A),XS(e)
- R(a);N_PINP(B)::R1(F),XP(c)
- Q(k);::R1(F),XP(c)
- R(a);N_PINP(B),N_SPINP(c)::P(B)
- R(a);N_PINP(B),N_SPINS(e)::R1(F),XP(c)
- B(h);N_SPINP(c),S_CUTR(a)::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).