MESON Chess Problem Database
Problem Display
PID: 273264 (7B/4n1r1/3p1p2/4k3/R2N3p/3PN3/qp2RQnK/7B w - - 0 1)
Heinonen, Unto
12th Comm., TW-25 JT, 1993
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Sc4#
- 2.Sg4#
- 1...Qe6
- 2.Sf3#
- 1...Rg3
- 2.Bxf6#
- 2.Qxf6#
- 1...Rg4
- 2.Bxf6#
- 2.Qxf6#
- 1...Rg5
- 2.Bxf6#
- 2.Qxf6#
- 1...Rh7
- 2.Bxf6#
- 2.Qxf6#
- 1...Rg8
- 2.Bxf6#
- 2.Qxf6#
- 1...Se1
- 2.Sd1#
- 2.Sf1#
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sef5#
- 1...Sxe3
- 2.Rxe3#
- 2.Qxe3#
- 1...Sf4
- 2.Sc4#
- 2.Sg4#
- 1...Sd5
- 2.Sc4#
- 2.Sg4#
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...Sg6
- 2.Qf5#
- 1...Sc8
- 2.Qf5#
- 1...Sg8
- 2.Qf5#
- 1...d5
- 2.Sc4#
- 1...f5
- 2.Bxg7#
- 1...Qd5
- Tries
- 1.Sd1+?
- 1...Se3
- 2.Rxe3#
- 2.Qxe3#
- 1...Kd5!
- 1...Se3
- 1.Sf1+?
- 1...Se3
- 2.Rxe3#
- 2.Qxe3#
- 1...Kd5!
- 1...Se3
- 1.Sec2+?
- 1...Se3
- 2.Rxe3#
- 2.Qxe3#
- 1...Kd5!
- 1...Se3
- 1.Sd5+?
- 1...Se3
- 2.Rxe3#
- 2.Qxe3#
- 2.Qf4#
- 2.Qxf6#
- 1...Kxd5!
- 1...Se3
- 1.Sef5+?
- 1...Se3
- 2.Rxe3#
- 2.Qxe3#
- 1...Kd5!
- 1...Se3
- 1.Sc6+?
- 1...Sxc6
- 2.Re4#
- 2.Qf5#
- 1...Ke6!
- 1...Sxc6
- 1.Bxg2?
- threat
- 2.Sd1#
- 2.Sf1#
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sef5#
- 1...Qc4
- 2.Sd1#
- 2.Sf1#
- 2.Sec2#
- 2.Sxc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sef5#
- 1...d5
- 2.Sc4#
- 2.Sef5#
- 1...f5
- 2.Sg4#
- 2.Sd5#
- 2.Bxg7#
- 1...b1Q
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 1...b1S
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 1...b1B
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 1...b1R
- 2.Sec2#
- 2.Sc4#
- 2.Sg4#
- 1...Qd5
- 2.Sc4#
- 2.Sg4#
- 2.Sxd5#
- 1...Rg3
- 2.Sc4#
- 2.Sg4#
- 2.Bxf6#
- 2.Qxf6#
- 1...Rg4
- 2.Sc4#
- 2.Sxg4#
- 2.Bxf6#
- 2.Qxf6#
- 1...Sd5
- 2.Sc4#
- 2.Sg4#
- 2.Sxd5#
- 2.Qf5#
- 1...Sf5
- 2.Sc4#
- 2.Sg4#
- 2.Sexf5#
- 2.Qxf5#
- 1...Rxg2+!
- threat
- 1.Bxg7?
- threat
- 2.Bxf6#
- 2.Qxf6#
- 1...d5
- 2.Sc4#
- 2.Qxf6#
- 1...Qe6
- 2.Sf3#
- 1...Sf4
- 2.Sc4#
- 2.Sg4#
- 1...Sd5
- 2.Sc4#
- 2.Sg4#
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sg8
- 2.Qf5#
- 1...Qf7!
- threat
- 1.Qf3?
- threat
- 2.Sxg2#
- 2.Sg4#
- 2.Qe4#
- 1...Qxa4
- 2.Qe4#
- 1...Sxe3
- 2.Rxe3#
- 2.Qe4#
- 2.Qxe3#
- 1...Qc4
- 2.Qe4#
- 1...f5
- 2.Sg4#
- 2.Bxg7#
- 1...b1Q
- 2.Sg4#
- 2.Qe4#
- 1...b1S
- 2.Sg4#
- 2.Qe4#
- 1...b1B
- 2.Sg4#
- 2.Qe4#
- 1...b1R
- 2.Sg4#
- 2.Qe4#
- 1...Qd5
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 2.Bxf6#
- 2.Qxf6#
- 1...Se1
- 2.Sd1#
- 2.Sf1#
- 2.Sec2#
- 2.Sg2#
- 2.Sg4#
- 2.Sd5#
- 2.Sef5#
- 2.Qe4#
- 1...Sf4
- 2.Sg4#
- 2.Qe4#
- 1...Sd5
- 2.Sg4#
- 2.Qe4#
- 2.Qf5#
- 1...Sf5
- 2.Sg4#
- 2.Qe4#
- 2.Qxf5#
- 1...d5!
- threat
- 1.Qf4+?
- 1...Sxf4
- 2.Sg4#
- 1...Kxf4!
- 1...Sxf4
- 1.Sd1+?
- Keys
- 1.Qxh4!
- threat
- 2.Qe4#
- 1...Sxh4
- 2.Sd5#
- 1...Rg4
- 2.Qxf6#
- 1...d5
- 2.Sc4#
- 1...Qd5
- 2.Sc4#
- 1...Rh7
- 2.Bxf6#
- 1...Sf4
- 2.Sg4#
- 1...f5
- 2.Bxg7#
- threat
- 1.Qxh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- Q(a);SBLOCK::S(H)
- S(h);N_GUARD::QAR1(C),XS(h)
- S(h);N_GUARD::QAR1(C)
- P(f);SBLOCK::R(B)+S(F),DCHECK
- P(g);OGATEB,P_SPINR(i)::B(I),XR(i)
- Tries
- Try
- S(F);CHECK
- Refutation
- K(e);P-FLIGHT,P_SPINS(c)
- Try
- S(F);CHECK
- Refutation
- K(e);P-FLIGHT,P_SPINS(c)
- Try
- S(F);CHECK
- Refutation
- K(e);P-FLIGHT,P_SPINS(c)
- Try
- S(F);CHECK
- Refutation
- K(e);P-FLIGHT,P_SPINS(c),XS(F)
- Try
- S(F);CHECK
- Refutation
- K(e);P-FLIGHT,P_SPINS(c)
- Try
- S(H);CHECK
- Refutation
- K(e);P-FLIGHT
- Try
- B(A);XS(c)
- Threat
- DUALS(7)
- Refutation
- R(i);CHECK,P_SPINP(g),XB(A)
- Try
- B(I);P_PINP(g),XR(i)
- Threat
- DUALS(2)
- Vars
- Q(a);SBLOCK::S(H)
- S(h);N_GUARD::QAR1(C),XS(h)
- S(h);N_GUARD::QAR1(C)
- Refutation
- Q(a);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- Q(a);XR(G)::QAR1(C)
- Q(a);::QAR1(C)
- Q(a);::R(B)+S(F),DCHECK
- Refutation
- P(f);
- Try
- Q(C);CHECK
- Vars
- S(c);SBLOCK,XQ(C)::R(B)+S(F),DCHECK
- Refutation
- K(e);S_FLIGHT,XQ(C)
- Try
- Actual
- Q(C);XP(d)
- Threat
- QAR1(C)
- Vars
- S(c);N_GUARD,XQ(C)::R(B)+S(F)
- R(i);P_SPINP(g)::QAB1(C),XP(g)
- P(f);SBLOCK::R(B)+S(F),DCHECK
- Q(a);SBLOCK::R(B)+S(F),DCHECK
- R(i);OGATE,P_PINQ(C),P_SPINP(g)::B(I),XP(g)
- S(c);SBLOCK::R(B)+S(F),DCHECK
- P(g);OGATEB,P_SPINR(i)::B(I),XR(i)
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).