MESON Chess Problem Database
Problem Display
PID: 249827 (8/2p2n2/2Q1pp2/5k1K/r3R1pp/3Rr1q1/b1B1N1N1/6bn w - - 0 1)
Hannelius, Jan Ingvar
Computer Test FIDE Albums, 1993
#2
7 + 13
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Sxh4#
- 1...Qe5
- 2.Sxh4#
- 1...Qd6
- 2.Sxh4#
- 1...Qf3
- 2.Sxh4#
- 1...Ra3
- 2.Sd4#
- 1...Rc4
- 2.Qxe6#
- 1...Rd4
- 2.Sxd4#
- 1...Ra5
- 2.Sd4#
- 1...Ra6
- 2.Sd4#
- 1...Ra7
- 2.Sd4#
- 1...Ra8
- 2.Sd4#
- 1...Bb1
- 2.Qxe6#
- 1...Bc4
- 2.Sd4#
- 1...Qf4
- Tries
- 1.Sxg3+?
- 1...Rxg3
- 2.Sxh4#
- 1...hxg3
- 2.Sh4#
- 1...Sxg3+!
- 1...Rxg3
- 1.Rdxe3?
- threat
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 1...Qxg2
- 2.Rf4#
- 2.Re5#
- 1...Qxe3
- 2.Sxh4#
- 1...Rxe4
- 2.Qxe4#
- 1...Qf4
- 2.Sxh4#
- 2.Rxf4#
- 2.Re5#
- 1...Qe5
- 2.Sxh4#
- 2.Rf4#
- 2.Rxe5#
- 1...Qd6
- 2.Sxh4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 1...Qf3
- 2.Sxh4#
- 2.Rf4#
- 2.Re5#
- 1...Ra3
- 2.Sd4#
- 2.Rf4#
- 2.Re5#
- 1...Rb4
- 2.Rxb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Re5#
- 1...Rc4
- 2.Rxc4#
- 2.Rf4#
- 2.Re5#
- 2.Qxe6#
- 1...Rd4
- 2.Sxd4#
- 2.Rxd4#
- 2.Rf4#
- 2.Re5#
- 1...Ra5
- 2.Sd4#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rxg4#
- 2.Re5#
- 2.Rxe6#
- 1...Ra6
- 2.Sd4#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rxg4#
- 2.Re5#
- 2.Rxe6#
- 1...Ra7
- 2.Sd4#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rxg4#
- 2.Re5#
- 2.Rxe6#
- 1...Ra8
- 2.Sd4#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 2.Rxg4#
- 2.Re5#
- 2.Rxe6#
- 1...Bb1
- 2.Rf4#
- 2.Re5#
- 2.Qxe6#
- 1...Bb3
- 2.Rf4#
- 2.Re5#
- 1...Bc4
- 2.Sd4#
- 2.Rxc4#
- 2.Rf4#
- 2.Re5#
- 1...Bd5
- 2.Rf4#
- 2.Re5#
- 1...Sf2
- 2.Rf4#
- 2.Re5#
- 1...Se5
- 2.Rf4#
- 2.Rxe5#
- 1...Sg5
- 2.Rf4#
- 2.Re5#
- 1...Sd6
- 2.Rf4#
- 2.Re5#
- 1...e5
- 2.Rf4#
- 2.Rxe5#
- 1...Bxe3!
- threat
- 1.Rd5+?
- 1...Qe5
- 2.Sxh4#
- 2.Rf4#
- 2.Rexe5#
- 1...Se5
- 2.Rf4#
- 2.Rexe5#
- 1...exd5
- 2.Qd7#
- 2.Qe6#
- 1...e5
- 2.Rf4#
- 2.Rexe5#
- 2.Qd7#
- 1...Bxd5!
- 1...Qe5
- 1.Rf4+?
- 1...Qxf4
- 2.Rd5#
- 1...Rxf4
- 2.Rd5#
- 1...Ke5!
- 1...Qxf4
- 1.Sxg3+?
- Keys
- 1.Rc4!
- threat
- 2.Rxe3#
- 2.Rd5#
- 1...Ke5
- 2.Qc5#
- 1...Qxg2
- 2.Rd5#
- 1...Rxe2
- 2.Rd5#
- 1...Rxd3
- 2.Qe4#
- 1...Rxc4
- 2.Rd5#
- 1...Bxc4
- 2.Rd5#
- 1...e5
- 2.Qd7#
- 1...Qf4
- 2.Rd5#
- 1...Qe5
- 2.Sxh4#
- 1...Qd6
- 2.Rd5#
- 1...Qf3
- 2.Rd5#
- 1...Rf3
- 2.Re3#
- 2.Rd5#
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 1...Re5
- 2.Rf3#
- 1...Ra3
- 2.Rd5#
- 1...Bb1
- 2.Rd5#
- 1...Bb3
- 2.Rd5#
- 1...Sf2
- 2.Rd5#
- 1...Se5
- 2.Sd4#
- 1...Sg5
- 2.Rd5#
- 1...Sd6
- 2.Rd5#
- threat
- 1.Rc4!
This is a version of 61002
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 12
- REMOVED MATES = 5
- Sets
- Q(e);N_GUARD::S(C),XP(h)
- R(f);N_GUARD::S(B)
- R(f);S_CUTB(c)::QAB1(G),XP(j)
- R(f);N_GUARD::S(B),XR(f)
- B(c);N_GUARD::QAB1(G),XP(j)
- B(c);S_CUTR(f)::S(B)
- Tries
- Try
- S(B);CHECK,XQ(e)
- Vars
- R(d);XS(B)::S(C),XP(h)
- P(h);XS(B)::S(C)
- Refutation
- S(b);CHECK,XS(B)
- Try
- R(D);XR(d)
- Threat
- DUALS(6)
- Vars
- Q(e);N_GUARD,XR(D)::S(C),XP(h)
- R(f);OGATE,P_SPINR(f),XR(E)::QAB1(G),XR(f)
- Refutation
- B(a);XR(D)
- Try
- R(D);CHECK
- Refutation
- B(c);XR(D)
- Try
- R(E);CHECK
- Vars
- Q(e);XR(E)::B(A)+R(D),DCHECK
- R(f);XR(E)::B(A)+R(D),DCHECK
- Refutation
- K(i);P-FLIGHT
- Try
- Actual
- R(E);
- Threat
- DUALS(2)
- Vars
- K(i);P-FLIGHT,S_CUTP(j),S_CUTQ(e),S_CUTR(d),S_CUTS(m)::QAR2(G)
- Q(e);XS(C)::B(A)+R(D),DCHECK
- R(d);XS(B)::B(A)+R(D),DCHECK
- R(d);N_GUARD,P_SPINR(d),XR(D)::QAB1(G)
- R(f);XR(E)::B(A)+R(D),DCHECK
- B(c);XR(E)::B(A)+R(D),DCHECK
- P(j);OGATEB,SBLOCK::QAB(G)
- Q(e);::B(A)+R(D),DCHECK
- Q(e);N_GUARD,SBLOCK::S(C),XP(h)
- R(d);N_GUARD::QAB1(G),XR(d)
- R(d);OGATE,SBLOCK::B(A)+R(D),DCHECK
- R(f);::B(A)+R(D),DCHECK
- B(c);::B(A)+R(D),DCHECK
- S(b);::B(A)+R(D),DCHECK
- S(m);SBLOCK::S(B)
- S(m);::B(A)+R(D),DCHECK
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).