MESON Chess Problem Database
Problem Display
PID: 133816 (6N1/1K1B2p1/1p1BR3/2pkN3/2rnp2q/n2PP3/8/b2Q4 w - - 0 1)
Kovalic, Jan
Die Schwalbe, 1986
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Se7#
- 1...Qf2
- 2.Se7#
- 1...Qg3
- 2.Se7#
- 1...Qe7
- 2.Sxe7#
- 1...Qh1
- 2.Se7#
- 1...Qh2
- 2.Se7#
- 1...Qh3
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Qg4
- 2.Se7#
- 1...Qh5
- 2.Se7#
- 1...Qh6
- 2.Se7#
- 1...Qh7
- 2.Se7#
- 1...Qh8
- 2.Se7#
- 1...Sb1
- 2.dxc4#
- 1...Sac2
- 2.dxc4#
- 1...Sab5
- 2.dxc4#
- 1...Sdc2
- 2.dxc4#
- 1...Se2
- 2.dxc4#
- 1...Sb3
- 2.dxc4#
- 1...Sf3
- 2.dxc4#
- 1...Sdb5
- 2.dxc4#
- 1...Sf5
- 2.dxc4#
- 1...Sc6
- 2.dxc4#
- 1...Sxe6
- 2.dxc4#
- 1...g5
- 2.Sf6#
- 2.Se7#
- 1...Qe1
- Tries
- 1.Sxc4?
- threat
- 2.Sxb6#
- 2.Re5#
- 1...Sxe6
- 2.Bc6#
- 1...exd3
- 2.Sxb6#
- 1...Qg3
- 2.Sxb6#
- 2.Se7#
- 1...Qg5
- 2.Sxb6#
- 1...Qf6
- 2.Sxb6#
- 1...Qe7
- 2.Sxb6#
- 2.Sxe7#
- 1...Qd8
- 2.Re5#
- 1...Qh2
- 2.Sxb6#
- 2.Se7#
- 1...Qf4
- 2.Sxb6#
- 2.Se7#
- 1...Qh5
- 2.Sxb6#
- 2.Se7#
- 1...Sdc2
- 2.Sxb6#
- 1...Se2
- 2.Sxb6#
- 1...Sb3
- 2.Sxb6#
- 1...Sf3
- 2.Sxb6#
- 1...Sdb5
- 2.Sxb6#
- 1...Sf5
- 2.Sxb6#
- 1...Sc6
- 2.Sxb6#
- 1...b5
- 2.Sb6#
- 2.Re5#
- 1...Sxc4!
- threat
- 1.Qg4?
- threat
- 2.dxe4#
- 1...Qxg4
- 2.Se7#
- 1...Sxe6
- 2.Qxe6#
- 1...exd3
- 2.e4#
- 1...Qh1
- 2.Se7#
- 1...Qh7
- 2.Se7#
- 1...Sdc2
- 2.Bc6#
- 1...Se2
- 2.Bc6#
- 1...Sb3
- 2.Bc6#
- 1...Sf3
- 2.Bc6#
- 1...Sdb5
- 2.Bc6#
- 1...Sc6
- 2.Bxc6#
- 1...Sf5!
- threat
- 1.dxe4+?
- 1...Qxe4
- 2.Se7#
- 1...Kxe4!
- 1...Qxe4
- 1.Sxc4?
- Keys
- 1.Sf7!
- threat
- 2.Re5#
- 1...Sxe6
- 2.Bc6#
- 1...Qg3
- 2.Se7#
- 2.dxe4#
- 1...Qg5
- 2.dxe4#
- 1...Qf6
- 2.dxe4#
- 1...Qe7
- 2.Sxe7#
- 2.dxe4#
- 1...Qh2
- 2.Se7#
- 2.dxe4#
- 1...Qf4
- 2.Se7#
- 1...Qh5
- 2.Se7#
- 2.dxe4#
- 1...Sdc2
- 2.dxe4#
- 1...Se2
- 2.dxe4#
- 1...Sb3
- 2.dxe4#
- 1...Sf3
- 2.dxe4#
- 1...Sdb5
- 2.dxe4#
- 1...Sf5
- 2.dxe4#
- 1...Sc6
- 2.dxe4#
- threat
- 1.Sf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 8
- ADDED MATES = 2
- REMOVED MATES = 15
- Sets
- Q(f);N_GUARD::S(I)
- Q(f);N_GUARD,P_PINB(H)::S(I),XQ(f)
- S(b);N_GUARD::P(B),XR(c)
- S(d);::QAR(A)+P(B)DCHECK,XR(c)
- S(d);XR(F)::QAR(A)+P(B)DCHECK,XR(c)
- Tries
- Try
- S(D);XR(c)
- Threat
- DUALS(2)
- Vars
- S(d);N_GUARD,SBLOCK,XR(F)::B(H)
- P(e);XP(B)::S(D),XP(i)
- Q(f);::S(D),XP(i)
- Q(f);::R1(F)
- S(d);::S(D),XP(i)
- Refutation
- S(b);XS(D)
- Try
- Q(A);
- Threat
- P(B),XP(e)
- Vars
- Q(f);N_GUARD,XQ(A)::S(I)
- S(d);OGATE,XR(F)::QAB1(A),XS(d)
- P(e);OGATE,XP(B)::P(C)
- Q(f);N_GUARD::S(I)
- S(d);N_GUARD::B(H)
- S(d);N_GUARD::B(H),XS(d)
- Refutation
- S(d);
- Try
- P(B);CHECK,P_PINS(d),XP(e)
- Vars
- Q(f);SBLOCK,XP(B)::S(I)
- Refutation
- K(h);N_SPINS(d),S_FLIGHT,XP(B)
- Try
- Actual
- S(D);
- Threat
- R1(F)
- Vars
- S(d);N_GUARD,SBLOCK,XR(F)::B(H)
- Q(f);N_GUARD::P(B),XP(e)
- Q(f);N_GUARD::S(I)
- S(d);::QAR(A)+P(B)DCHECK,XP(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).