MESON Chess Problem Database
Problem Display
PID: 241104 (3B4/K1p1R3/1N2BkP1/4b2P/7P/2p1N3/1n3qrp/1Q1r2n1 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
Shakhmaty (Riga), 1974
#2
10 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qf5#
- 1...Qxe3
- 2.Qf5#
- 1...Qg3
- 2.Qf5#
- 1...Qxh4
- 2.Qf5#
- 1...Qd2
- 2.Qf5#
- 1...Qe2
- 2.Qf5#
- 1...Qf5
- 2.Qxf5#
- 1...Rxb1
- 2.Sed5#
- 2.Sbd5#
- 2.Sd7#
- 1...Rc1
- 2.Sed5#
- 2.Sbd5#
- 2.Sd7#
- 1...Re1
- 2.Sed5#
- 2.Sbd5#
- 2.Sd7#
- 1...Rf1
- 2.Sed5#
- 2.Sbd5#
- 2.Sd7#
- 1...Rd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...Rd7
- 2.Sxd7#
- 1...Rg4
- 2.Sxg4#
- 1...Rxg6
- 2.Qxg6#
- 1...Bg3
- 2.Sg4#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Sf3
- 2.Qf5#
- 1...Sd3
- 2.Sed5#
- 2.Sbd5#
- 2.Sd7#
- 1...Qe1
- Tries
- 1.Ba2?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Rxd8
- 2.Rf7#
- 1...Rd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Sc4!
- threat
- 1.Bb3?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Rxd8
- 2.Rf7#
- 1...Rd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Sc4!
- threat
- 1.Bh3?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Rxd8
- 2.Rf7#
- 1...Rxg6
- 2.Rd7#
- 2.Qxg6#
- 1...Qf5
- 2.Qxf5#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Rg4
- 2.Sxg4#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Sxh3!
- threat
- 1.Bc4?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Rxd8
- 2.Rf7#
- 1...Rd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Sxc4!
- threat
- 1.Bg4?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Rxd8
- 2.Rf7#
- 1...Rxg4
- 2.Sxg4#
- 1...Qf5
- 2.Qxf5#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Bg3!
- threat
- 1.Bd5?
- threat
- 2.Sd7#
- 2.Rxc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 1...Qxe3
- 2.Rxc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 1...Qxh4
- 2.Rxc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 2.Qf5#
- 1...Rxd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...cxb6
- 2.Rb7#
- 2.Rc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 1...Qf5
- 2.Rxc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 2.Qxf5#
- 1...Bg3
- 2.Sg4#
- 2.Sd7#
- 1...Bf4
- 2.Sd7#
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...c5
- 2.Sd7#
- 2.Rb7#
- 2.Rc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 1...c6
- 2.Sd7#
- 2.Rb7#
- 2.Rc7#
- 2.Rd7#
- 2.Rf7#
- 2.Rh7#
- 1...Bd4!
- threat
- 1.Bf5?
- threat
- 2.Rd7#
- 2.Rf7#
- 1...Qxf5
- 2.Qxf5#
- 1...Rxd8
- 2.Rf7#
- 1...Rxg6
- 2.Rd7#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 2.Rf7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bd6
- 2.Sd7#
- 1...Bf4!
- threat
- 1.Bd7?
- threat
- 2.Rf7#
- 2.Rh7#
- 1...Rxd7
- 2.Sxd7#
- 1...Rxg6
- 2.Rh7#
- 2.Qxg6#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6!
- threat
- 1.Bg8?
- threat
- 2.Rd7#
- 1...Rd7
- 2.Sxd7#
- 2.Rxd7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- 1...Rxd8!
- threat
- 1.Ba2?
- Keys
- 1.Bc8!
- threat
- 2.Rf7#
- 1...Rxg6
- 2.Qxg6#
- 1...Rd7
- 2.Sxd7#
- 1...Bg3
- 2.Sg4#
- 1...Bd4
- 2.Sd5#
- 1...Bf4
- 2.Qf5#
- 1...Bd6
- 2.Sd7#
- threat
- 1.Bc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(d);N_GUARD::QAR1(A)
- Q(d);N_GUARD,P_PINS(E),XS(B)::QAR1(A)
- Q(d);N_GUARD,XP(C)::QAR1(A)
- Q(d);N_GUARD::QAR1(A),XQ(d)
- R(a);N_GUARD::S(E),XR(a)
- R(e);N_GUARD::S(B),XR(e)
- R(e);OGATE,XP(G)::QAR1(A),XR(e)
- B(h);S_CUTR(e)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- S(b);S_CUTQ(d)::QAR1(A)
- Tries
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(J)::R1(I)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- S(c);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(J)::R1(I)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- S(c);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(J)::R1(I)
- Q(d);N_GUARD::QAR1(A),XQ(d)
- R(e);N_GUARD::S(B),XR(e)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- S(b);XB(F)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(J)::R1(I)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- S(c);XB(F)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(J)::R1(I)
- R(e);XB(F)::S(B),XR(e)
- Q(d);N_GUARD::QAR1(A),XQ(d)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- B(h);
- Try
- B(F);
- Threat
- DUALS(5)
- Vars
- B(h);::S(E)
- Refutation
- B(h);P_PINS(E)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(d);OGATE,XB(F)::QAR1(A),XQ(d)
- R(a);XB(J)::R1(I)
- R(e);XP(G)::B(J)+R(I)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTR(a)::S(E)
- Refutation
- B(h);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(a);XB(F)::S(E),XR(a)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- Refutation
- B(h);
- Try
- B(F);
- Threat
- B(J)+R(I)
- Vars
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
- Refutation
- R(a);XB(J)
- Try
- Actual
- B(F);
- Threat
- B(J)+R(I),DCHECK
- Vars
- R(e);OGATE,XP(G)::QAR1(A),XR(e)
- R(a);N_GUARD::S(E),XR(a)
- B(h);S_CUTR(e)::S(B)
- B(h);P_PINS(E),S_CUTR(a)::S(B)
- B(h);S_CUTQ(d)::QAR1(A)
- B(h);S_CUTR(a)::S(E)
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).