MESON Chess Problem Database
Problem Display
PID: 225929 (1q2N3/5R1K/1p1b4/7R/3Nk3/8/4nB2/rb1Q2n1 w - - 0 1)
Kubbel, Evgeny Ivanovich
Tidskrift for Schack, 1910
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Sxd6#
- 1...Qb7
- 2.Sxd6#
- 1...Qa8
- 2.Sxd6#
- 1...Qc8
- 2.Sxd6#
- 1...Ra4
- 2.Qxb1#
- 1...Ra5
- 2.Qxb1#
- 1...Ra6
- 2.Qxb1#
- 1...Ra7
- 2.Qxb1#
- 1...Ra8
- 2.Qxb1#
- 1...Ba2
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bf4
- 2.Sf6#
- 1...Sf3
- 2.Qxe2#
- 1...Sh3
- 2.Qxe2#
- 1...Sxd4
- 2.Qxd4#
- 1...Sf4
- 2.Sf6#
- 1...Qa7
- Tries
- 1.Sxe2?
- threat
- 2.Sc3#
- 2.Qd4#
- 2.Qd5#
- 1...Sxe2
- 2.Qxe2#
- 2.Qd5#
- 1...Bf4
- 2.Sc3#
- 2.Qd5#
- 1...Qc7
- 2.Qd4#
- 2.Qd5#
- 1...Qb7
- 2.Sc3#
- 2.Sxd6#
- 2.Qd4#
- 1...Qa8
- 2.Sc3#
- 2.Sxd6#
- 2.Qd4#
- 1...Qc8
- 2.Sxd6#
- 2.Qd4#
- 2.Qd5#
- 1...Ra3
- 2.Qd4#
- 2.Qd5#
- 1...Ra4
- 2.Sc3#
- 2.Qxb1#
- 2.Qd5#
- 1...Ra5
- 2.Sc3#
- 2.Qxb1#
- 2.Qd4#
- 1...Ba2
- 2.Sc3#
- 2.Qc2#
- 2.Qd4#
- 1...Bd3
- 2.Sc3#
- 1...Bb4
- 2.Qd4#
- 2.Qd5#
- 1...Bc5
- 2.Sc3#
- 2.Qd5#
- 1...Sf3
- 2.Sc3#
- 2.Sf6#
- 2.Qd5#
- 1...Be5!
- threat
- 1.Sb3?
- threat
- 2.Qd5#
- 1...Qb7
- 2.Sxd6#
- 1...Qa8
- 2.Sxd6#
- 1...Ra5
- 2.Qxb1#
- 1...Bd3
- 2.Sd2#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Sf6#
- 1...Be5!
- threat
- 1.Se6?
- threat
- 2.Qd5#
- 1...Be5
- 2.Sg5#
- 1...Qb7
- 2.Sxd6#
- 1...Qa8
- 2.Sxd6#
- 1...Ra5
- 2.Qxb1#
- 1...Ba2
- 2.Qc2#
- 1...Sc3
- 2.Sf6#
- 2.Qd4#
- 1...Sd4
- 2.Sf6#
- 2.Qxd4#
- 1...Sf4
- 2.Sf6#
- 1...Bd3!
- threat
- 1.Rf4+?
- 1...Bxf4
- 2.Sf6#
- 1...Sxf4
- 2.Sf6#
- 1...Kxf4+!
- 1...Bxf4
- 1.Qd2?
- threat
- 2.Sf6#
- 2.Qe3#
- 1...Qxe8
- 2.Qe3#
- 1...Sxd4
- 2.Qe3#
- 2.Qxd4#
- 1...Qd8
- 2.Qe3#
- 1...Ra3
- 2.Sf6#
- 1...Bf4
- 2.Sf6#
- 1...Be7
- 2.Qe3#
- 1...Be5!
- threat
- 1.Sxe2?
- Keys
- 1.Sf3!
- threat
- 2.Qd5#
- 1...Be5
- 2.Sg5#
- 1...Qb7
- 2.Sxd6#
- 1...Qa8
- 2.Sxd6#
- 1...Ra5
- 2.Qxb1#
- 1...Ba2
- 2.Qc2#
- 1...Bd3
- 2.Sd2#
- 1...Sc3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Sf6#
- threat
- 1.Sf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 10
- Sets
- Q(h);N_GUARD,P_PINR(E)::S(G),XB(g)
- Q(h);N_GUARD::S(G),XB(g)
- R(a);N_GUARD::QAB(A),XB(b)
- R(a);N_GUARD,P_PINR(E)::QAB(A),XB(b)
- B(b);N_GUARD::QAB(A)
- B(b);N_GUARD::QAB(A),XB(b)
- B(g);SBLOCK::S(G)
- S(c);N_GUARD::QAR2(A),XS(d)
- S(d);OGATE,XS(C)::QAR1(A),XS(d)
- S(d);SBLOCK::S(G)
- Tries
- Try
- S(C);XS(d)
- Threat
- DUALS(3)
- Vars
- B(b);::S(C)
- Refutation
- B(g);
- Try
- S(C);
- Threat
- QAB1(A)
- Vars
- Q(h);N_GUARD,P_PINR(E)::S(G),XB(g)
- Q(h);N_GUARD::S(G),XB(g)
- R(a);N_GUARD::QAB(A),XB(b)
- B(b);SBLOCK::S(C)
- S(d);N_GUARD::QAR1(A)
- S(d);N_GUARD::QAR1(A),XS(d)
- S(d);SBLOCK::S(G)
- Refutation
- B(g);
- Try
- S(C);
- Threat
- QAB1(A)
- Vars
- B(g);SBLOCK::S(C)
- Q(h);N_GUARD,P_PINR(E)::S(G),XB(g)
- Q(h);N_GUARD::S(G),XB(g)
- R(a);N_GUARD::QAB(A),XB(b)
- B(b);N_GUARD::QAB(A)
- S(d);::S(G)
- Refutation
- B(b);
- Try
- R(E);CHECK
- Vars
- B(g);SBLOCK,XR(E)::S(G)
- S(d);SBLOCK,XR(E)::S(G)
- Refutation
- K(e);CHECK,P-FLIGHT,XR(E)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(h);XS(G)::QAR1(A)
- Q(h);::QAR1(A)
- R(a);::S(G)
- B(g);::S(G)
- B(g);::QAR1(A)
- Refutation
- B(g);
- Try
- Actual
- S(C);
- Threat
- QAB1(A)
- Vars
- B(g);SBLOCK::S(C)
- Q(h);N_GUARD,P_PINR(E)::S(G),XB(g)
- Q(h);N_GUARD::S(G),XB(g)
- R(a);N_GUARD::QAB(A),XB(b)
- B(b);N_GUARD::QAB(A)
- B(b);SBLOCK::S(C)
- S(d);N_GUARD::QAR1(A)
- S(d);N_GUARD::QAR1(A),XS(d)
- S(d);SBLOCK::S(G)
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).