MESON Chess Problem Database
Problem Display
PID: 228049 (1N6/4P3/RP1B4/qk3rn1/b2Pr3/Q2KN3/5P2/5B2 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
Freie Presse, 1974
#2
11 + 6
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qxa4#
- 1...Qd2+
- 2.Kxd2#
- 1...Qc3+
- 2.Kxc3#
- 1...Qb4
- 2.Qxb4#
- 1...Qxb6
- 2.Kd2#
- 2.Kc3#
- 2.Qb4#
- 2.Qxa4#
- 1...Qxa6
- 2.Qb4#
- 1...Rxe3+
- 2.Kxe3#
- 1...Rxd4+
- 2.Kxd4#
- 1...Ref4
- 2.e8Q#
- 2.e8B#
- 1...Rg4
- 2.e8Q#
- 2.e8B#
- 1...Rh4
- 2.e8Q#
- 2.e8B#
- 1...Rxf2
- 2.Qc5#
- 1...Rf3
- 2.Qc5#
- 1...Rff4
- 2.Qc5#
- 1...Rc5
- 2.Qxc5#
- 1...Rf6
- 2.Qc5#
- 1...Rf7
- 2.Qc5#
- 1...Rf8
- 2.Qc5#
- 1...Bd1
- 2.Qxa5#
- 1...Bc2+
- 2.Kxc2#
- 1...Bb3
- 2.Qxa5#
- 1...Sf3
- 2.Kxe4#
- 1...Sh3
- 2.Kxe4#
- 1...Se6
- 2.Kxe4#
- 2.e8Q#
- 2.e8B#
- 1...Sf7
- 2.Kxe4#
- 1...Sh7
- 2.Kxe4#
- 1...Qe1
- Tries
- 1.Rxa5+?
- 1...Kxa5
- 2.Qb4#
- 1...Kxb6!
- 1...Kxa5
- 1.Qb2+?
- 1...Qb4
- 2.Qxb4#
- 1...Bb3!
- 1...Qb4
- 1.Qb3+?
- 1...Qb4
- 2.Kc2#
- 2.Qxb4#
- 1...Bxb3!
- 1...Qb4
- 1.Qc3?
- threat
- 2.Kd2#
- 2.Qxa5#
- 2.Qc4#
- 2.Qc6#
- 1...Qxc3+
- 2.Kxc3#
- 1...Rxe3+
- 2.Kxe3#
- 1...Rxd4+
- 2.Kxd4#
- 1...Qxb6
- 2.Kd2#
- 2.Qb4#
- 2.Qc4#
- 1...Qxa6
- 2.Qb4#
- 1...Rxf2
- 2.Qxa5#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 1...Bd1
- 2.Qxa5#
- 2.Qc4#
- 2.Qc6#
- 1...Bb3
- 2.Qxa5#
- 2.Qc6#
- 1...Qb4
- 2.Qxb4#
- 2.Qc6#
- 1...Rc5
- 2.Qxa5#
- 2.Qxc5#
- 1...Sf3
- 2.Kxe4#
- 2.Qxa5#
- 2.Qc4#
- 2.Qc6#
- 1...Bc2+!
- threat
- 1.Rxa5+?
- Keys
- 1.Ke2!
- threat
- 2.Qd3#
- 1...Qe1+
- 2.Kxe1#
- 1...Qd2+
- 2.Kxd2#
- 1...Rxe3+
- 2.Kxe3#
- 1...Rxf2+
- 2.Kxf2#
- 1...Bd1+
- 2.Kxd1#
- 1...Qxa6
- 2.Qb4#
- 1...Rxd4
- 2.e8Q#
- 2.e8B#
- 1...Qc3
- 2.Qxa4#
- 1...Qb4
- 2.Qxb4#
- 1...Rc5
- 2.Qxc5#
- 1...Bc2
- 2.Qxa5#
- 1...Bb3
- 2.Qxa5#
- threat
- 1.Ke2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 0
- REMOVED MATES = 10
- Sets
- Q(c);N_GUARD::QAB1(C),XB(a)
- Q(c);CHECK::B(A)+K(D),XQ(c)
- Q(c);N_GUARD::QAR1(C),XQ(c)
- Q(c);N_GUARD,XR(G)::QAR1(C)
- R(b);CHECK,XS(E)::B(A)+K(D),XR(b)
- R(b);CHECK,XP(F)::B(A)+K(D),XR(b)
- R(b);N_GUARD::P=Q
- R(e);N_GUARD,XP(B)::QAR1(C)
- R(e);N_GUARD,P_PINS(E)::QAR1(C)
- R(e);N_GUARD::QAR1(C)
- R(e);N_GUARD::QAR1(C),XR(e)
- B(a);OGATE::QAR1(C),XQ(c)
- B(a);CHECK::B(A)+K(D),XB(a)
- S(f);::B(A)+K(D),XR(b)
- Tries
- Try
- R(G);CHECK,XQ(c)
- Vars
- K(d);P-FLIGHT,P_SPINB(a),XR(G)::QAB1(C)
- Refutation
- K(d);P-FLIGHT,XP(H)
- Try
- Q(C);CHECK
- Vars
- Q(c);N_GUARD,P_SPINQ(c)::QAR1(C),XQ(c)
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(C);CHECK
- Refutation
- B(a);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(4)
- Vars
- Q(c);CHECK,XQ(C)::B(A)+K(D),XQ(c)
- R(b);CHECK,XS(E)::B(A)+K(D),XR(b)
- R(b);CHECK,XP(F)::B(A)+K(D),XR(b)
- Q(c);N_GUARD,XR(G)::QAR1(C)
- Refutation
- B(a);CHECK
- Try
- Actual
- K(D);P_SPINS(E),S_FLIGHT
- Threat
- QAB(C)
- Vars
- Q(c);CHECK::B(A)+K(D),XQ(c)
- R(b);CHECK,XS(E)::B(A)+K(D),XR(b)
- R(e);CHECK,XP(B)::B(A)+K(D),XR(e)
- B(a);CHECK::B(A)+K(D),XB(a)
- Q(c);N_GUARD,XR(G)::QAR1(C)
- R(b);N_GUARD,N_PINS(E),XP(F)::P=Q
- Q(c);N_GUARD::QAB1(C),XB(a)
- Q(c);N_GUARD::QAR1(C),XQ(c)
- R(e);N_GUARD::QAR1(C),XR(e)
- B(a);OGATE::QAR1(C),XQ(c)
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).