MESON Chess Problem Database
Problem Display
PID: 250183 (4n1n1/4bR1B/r3N1K1/1N4p1/4k3/1Q6/2P1q2B/4r3 w - - 0 1)
Kalina, Vasily Emanuilovich
Shakhmaty, 1927
#2
8 + 8
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd3
- 2.Qxd3#
- 1...Qf3
- 2.Qxf3#
- 1...Qc4
- 2.Qf3#
- 1...Qg4
- 2.Qd3#
- 1...Qxb5
- 2.Qf3#
- 1...Qh5+
- 2.Kxh5#
- 1...Qxc2
- 2.Kh5#
- 2.Qf3#
- 1...Qd2
- 2.Kh5#
- 2.Qf3#
- 1...Qf2
- 2.Qd3#
- 1...Qg2
- 2.Kh5#
- 2.Qd3#
- 1...Qe3
- 2.Kh5#
- 1...Rxe6+
- 2.Qxe6#
- 1...Ba3
- 2.Kxg5#
- 1...Bb4
- 2.Kxg5#
- 1...Bc5
- 2.Kxg5#
- 1...Bd6
- 2.Kxg5#
- 2.Sxg5#
- 1...Bf6
- 2.Sc5#
- 1...Bf8
- 2.Kxg5#
- 1...Sd6
- 2.Sc5#
- 1...Sef6
- 2.Sxg5#
- 1...Sc7
- 2.Kg7#
- 1...Sg7
- 2.Kxg7#
- 1...Sgf6
- 2.Sxg5#
- 1...Sh6
- 2.Kxh6#
- 1...g4
- 2.Kh5#
- 1...Qd3
- Tries
- 1.Rf5?
- threat
- 2.Re5#
- 1...Rxe6+
- 2.Qxe6#
- 1...Qxb5
- 2.Qf3#
- 1...Qxh2
- 2.Qd3#
- 2.Qf3#
- 1...Qd3
- 2.Qxd3#
- 1...Qe3
- 2.Qd5#
- 1...Bd6
- 2.Sxg5#
- 1...Bf6
- 2.Sc5#
- 1...Qh5+!
- threat
- 1.Rf6?
- threat
- 2.Kxg5#
- 2.Kf7#
- 2.Sxg5#
- 1...Qh5+
- 2.Kxh5#
- 1...Qxb5
- 2.Qf3#
- 1...Rxe6
- 2.Kxg5#
- 2.Kf7#
- 2.Rxe6#
- 2.Qxe6#
- 1...Bxf6
- 2.Kf7#
- 2.Sc5#
- 1...Sexf6
- 2.Sxg5#
- 1...Sgxf6
- 2.Sxg5#
- 1...Qd3
- 2.Qxd3#
- 1...Qc4
- 2.Qf3#
- 1...Qf1
- 2.Sxg5#
- 1...Qf3
- 2.Sxg5#
- 2.Qxf3#
- 1...Qg4
- 2.Qd3#
- 1...Qd2
- 2.Kh5#
- 2.Kf7#
- 2.Qf3#
- 1...Qf2
- 2.Sxg5#
- 2.Qd3#
- 1...Qg2
- 2.Kh5#
- 2.Kf7#
- 2.Qd3#
- 1...Qe3
- 2.Kh5#
- 2.Kf7#
- 1...Rf1
- 2.Sxg5#
- 1...Rg1
- 2.Kf7#
- 1...Sd6
- 2.Sc5#
- 2.Sxg5#
- 1...Sg7
- 2.Kxg7#
- 2.Sxg5#
- 1...Sh6
- 2.Kxh6#
- 2.Sxg5#
- 1...g4
- 2.Kg5#
- 2.Kh5#
- 2.Kf7#
- 2.Sg5#
- 1...Qxh2!
- threat
- 1.Qc4+?
- 1...Ke3
- 2.Qd4#
- 1...Qxc4!
- 1...Ke3
- 1.Qd5+?
- 1...Ke3
- 2.Qd4#
- 1...Kxd5!
- 1...Ke3
- 1.Rf5?
- Keys
- 1.Rf2!
- threat
- 2.Kf7#
- 1...Qh5+
- 2.Kxh5#
- 1...Rxe6+
- 2.Qxe6#
- 1...Qxb5
- 2.Qf3#
- 1...Qxf2
- 2.Qd3#
- 1...Qd3
- 2.Qxd3#
- 1...Qc4
- 2.Qf3#
- 1...Qf3
- 2.Qxf3#
- 1...Qg4
- 2.Qd3#
- 1...Sd6
- 2.Sc5#
- 1...Sef6
- 2.Sxg5#
- 1...Sg7
- 2.Kxg7#
- 1...Sgf6
- 2.Sxg5#
- 1...Sh6
- 2.Kxh6#
- threat
- 1.Rf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD::QAB1(C),XQ(b)
- Q(b);N_GUARD::QAB1(C)
- Q(b);N_GUARD,XS(D)::QAB1(C)
- Q(b);CHECK::B(H)+K(F),XQ(b)
- Q(b);::B(H)+K(F)
- R(e);CHECK,OGATE,XS(E)::QAR2(C),XR(e)
- B(f);::B(H)+K(F),XP(d)
- B(f);N_PINS(E)::S(E)
- S(g);N_PINS(E)::S(E)
- S(g);N_PINS(E)::S(E),XP(d)
- S(g);::B(H)+K(F)
- S(g);::B(H)+K(F),XS(g)
- S(h);N_PINS(E)::S(E),XP(d)
- S(h);::B(H)+K(F),XS(h)
- P(d);::B(H)+K(F)
- Tries
- Try
- R(G);
- Threat
- R1(G)
- Vars
- R(e);CHECK,OGATE,XS(E)::QAR2(C),XR(e)
- Q(b);N_GUARD,XS(D)::QAB1(C)
- Q(b);N_GUARD::QAB1(C),XQ(b)
- Q(b);SBLOCK::QAB1(C)
- B(f);N_PINS(E)::S(E),XP(d)
- B(f);N_PINS(E)::S(E)
- Refutation
- Q(b);CHECK
- Try
- R(G);N_SPINS(E)
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK::B(H)+K(F),XQ(b)
- Q(b);N_GUARD,XS(D)::QAB1(C)
- S(g);XR(G)::S(E),XP(d)
- S(h);XR(G)::S(E),XP(d)
- Q(b);N_GUARD::QAB1(C),XQ(b)
- Q(b);N_GUARD::QAB1(C)
- Q(b);::S(E),XP(d)
- R(a);::S(E),XP(d)
- R(a);::B(H)+K(F)
- Refutation
- Q(b);XB(B)
- Try
- Q(C);CHECK
- Vars
- K(c);P-FLIGHT::QAB1(C)
- Refutation
- Q(b);XQ(C)
- Try
- Q(C);CHECK
- Vars
- K(c);P-FLIGHT::QAB1(C)
- Refutation
- K(c);S_FLIGHT,XQ(C)
- Try
- Actual
- R(G);
- Threat
- B(H)+K(F)
- Vars
- Q(b);CHECK::B(H)+K(F),XQ(b)
- R(e);CHECK,OGATE,XS(E)::QAR2(C),XR(e)
- Q(b);N_GUARD,XS(D)::QAB1(C)
- Q(b);N_GUARD,XR(G)::QAB1(C)
- Q(b);N_GUARD::QAB1(C),XQ(b)
- Q(b);N_GUARD::QAB1(C)
- S(g);N_PINS(E)::S(E)
- S(g);N_PINS(E)::S(E),XP(d)
- S(g);::B(H)+K(F),XS(g)
- S(h);N_PINS(E)::S(E),XP(d)
- S(h);::B(H)+K(F),XS(h)
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).