MESON Chess Problem Database
Problem Display
PID: 239944 (2Bb2r1/3RP3/3qk1P1/2R2p1N/N4Pp1/4K3/8/4Q2n w - - 0 1)
Hermanson, Halvar
Parallele 50, 1949
#2
10 + 7
| 5454 | Near Snap | 2021 |
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxf4+
- 2.Kxf4#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qe5+
- 2.Rxe5#
- 1...Qxe7
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Re5#
- 1...Qd1
- 2.Re5#
- 1...Qd2+
- 2.Kxd2#
- 1...Qd3+
- 2.Kxd3#
- 1...Qd4+
- 2.Kxd4#
- 1...Qa6
- 2.Re5#
- 1...Qb6
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 1...Qc6
- 2.Re5#
- 2.Rxc6#
- 1...Rxg6
- 2.exd8S#
- 1...Rg7
- 2.exd8S#
- 1...Qxf4+
- Tries
- 1.exd8Q?
- threat
- 2.Rxd6#
- 2.Re7#
- 2.Qf6#
- 2.Qxg8#
- 1...Qxf4+
- 2.Kxf4#
- 2.Sxf4#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qe5+
- 2.Rxe5#
- 1...Qd2+
- 2.Kxd2#
- 2.Rxd2#
- 1...Qd3+
- 2.Kxd3#
- 2.Rxd3#
- 1...Qd4+
- 2.Kxd4#
- 2.Rxd4#
- 1...Qxd7
- 2.Qf6#
- 2.Qxd7#
- 1...Rxg6
- 2.Re7#
- 1...Qc7
- 2.Rd6#
- 2.Rdxc7#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qe7
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Re5#
- 2.Rd6#
- 2.Rxe7#
- 2.Qxe7#
- 1...Qb8
- 2.Rd6#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qf8
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Re5#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Rd6#
- 2.Ra7#
- 2.Rb7#
- 2.Rdc7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qd1
- 2.Re5#
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Rd6#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qd5
- 2.Rdxd5#
- 2.Rd6#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qa6
- 2.Re5#
- 2.Rd6#
- 2.Rb7#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qb6
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxb6#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Qc6
- 2.Re5#
- 2.Rxc6#
- 2.Rd6#
- 2.Re7#
- 2.Qf6#
- 2.Qe7#
- 2.Qxg8#
- 1...Rg7
- 2.Sxg7#
- 2.Rxd6#
- 2.Re7#
- 2.Qf6#
- 1...Re8
- 2.Sg7#
- 2.Rxd6#
- 2.Re7#
- 2.Qf6#
- 1...Rf8
- 2.Sg7#
- 2.Rxd6#
- 2.Re7#
- 1...Rh8
- 2.Sg7#
- 2.Rxd6#
- 2.Re7#
- 2.Qf6#
- 1...Rxd8!
- threat
- 1.e8Q+?
- 1...Qe7
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Re5#
- 2.Rc6#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Rxd8#
- 1...Be7
- 2.Rxe7#
- 2.Qf7#
- 2.Qxg8#
- 1...Rxe8!
- 1...Qe7
- 1.e8R+?
- 1...Qe7
- 2.Kd2#
- 2.Kd3#
- 2.Kd4#
- 2.Re5#
- 2.Rc6#
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Rdxd8#
- 1...Be7
- 2.Rdxe7#
- 1...Rxe8!
- 1...Qe7
- 1.exd8Q?
- Keys
- 1.Qh4!
- threat
- 2.Qf6#
- 1...Qxf4+
- 2.Sxf4#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qe5+
- 2.Rxe5#
- 1...Qd2+
- 2.Rxd2#
- 1...Qd3+
- 2.Rxd3#
- 1...Qd4+
- 2.Rxd4#
- 1...Qxe7
- 2.Re5#
- 1...Rxg6
- 2.exd8S#
- 1...Bxe7
- 2.Rxe7#
- 1...Rf8
- 2.Sg7#
- threat
- 1.Qh4!
This anticipates 18592(1957)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(d);CHECK,XP(D)::QAR(A)+K(B),XQ(d)
- Q(d);CHECK,XR(E)::S(C),XQ(d)
- Q(d);CHECK,N_GUARD::R1(E),XQ(d)
- Q(d);N_GUARD::R1(E)
- Q(d);CHECK::QAR(A)+K(B),XQ(d)
- R(g);N_GUARD,XP(G)::PXB(f)=S
- R(g);N_GUARD::PXB(f)=S
- Tries
- Try
- P(I);XB(f)
- Threat
- DUALS(4)
- Vars
- Q(d);CHECK,XR(E)::S(C),XQ(d)
- Q(d);CHECK,N_GUARD::R1(E),XQ(d)
- R(g);XP(G)::B(J)+R(H),DCHECK
- Refutation
- R(g);XQ(I)
- Try
- P(I);CHECK
- Refutation
- R(g);XQ(I)
- Try
- P(I);CHECK
- Vars
- B(f);P_SPINB(f)::B(J)+R(H),DCHECK,XB(f)
- Refutation
- R(g);XR(I)
- Try
- Actual
- Q(A);
- Threat
- QAR1(A)
- Vars
- Q(d);CHECK,XP(D)::S(F),XQ(d)
- Q(d);CHECK,XR(E)::S(C),XQ(d)
- Q(d);CHECK,N_GUARD::R1(E),XQ(d)
- Q(d);CHECK,OGATE::B(J)+R(H),XQ(d)
- Q(d);N_GUARD,XP(I)::R1(E)
- R(g);N_GUARD,XP(G)::PXB(f)=S
- B(f);OGATE,XP(I)::B(J)+R(H),DCHECK,XB(f)
- R(g);N_GUARD::S(F)
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).