MESON Chess Problem Database
Problem Display
PID: 241416 (1qr3b1/8/4p3/R2p1P2/3kBRNK/3p1P2/QP6/8 w - - 0 1)
Hjelle, David
Arbejder-Skak, 1950
#2
9 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa7
- 2.Bxd5#
- 1...Qb3
- 2.Bxd5#
- 1...Qb4
- 2.Bxd5#
- 1...Qb6
- 2.Bxd5#
- 1...Qb7
- 2.Bxd5#
- 1...Qa8
- 2.Bxd5#
- 1...Rc7
- 2.Bxd5#
- 1...dxe4
- 2.Rxe4#
- 1...Qa7
- Tries
- 1.Qb3?
- threat
- 2.Qxd3#
- 1...Qxb3
- 2.Bxd5#
- 1...dxe4
- 2.Rxe4#
- 1...Rc3
- 2.Qxc3#
- 2.bxc3#
- 1...d2
- 2.Qd3#
- 1...Qb5!
- threat
- 1.Qa4+?
- 1...Qb4
- 2.Bxd5#
- 1...Rc4!
- 1...Qb4
- 1.Qb3?
- Keys
- 1.Qa3!
- threat
- 2.Qxd3#
- 1...Kc4
- 2.Bxd3#
- 2.Bxd5#
- 2.Qc3#
- 1...dxe4
- 2.Rxe4#
- 1...Qb3
- 2.Bxd5#
- 1...Qb5
- 2.Bxd3#
- 1...Rc3
- 2.Qxc3#
- 1...d2
- 2.Qd3#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(e);N_GUARD::R(E)+B(D),XP(c)
- R(f);S_CUTQ(e)::R(E)+B(D),XP(c)
- P(c);OGATE,P_SPINP(c),XB(D)::R1(E),XP(c)
- Tries
- Try
- Q(A);
- Threat
- QAR1(A),XP(a)
- Vars
- Q(e);N_GUARD,XQ(A)::R(E)+B(D),XP(c)
- P(c);OGATE,P_SPINP(c),XB(D)::R1(E),XP(c)
- P(a);::QAR1(A)
- Refutation
- Q(e);
- Try
- Q(A);CHECK
- Vars
- Q(e);P_SPINQ(e)::R(E)+B(D),XP(c)
- Refutation
- R(f);P_SPINR(f)
- Try
- Actual
- Q(A);
- Threat
- QAR1(A),XP(a)
- Vars
- P(c);OGATE,P_SPINP(c),XB(D)::R1(E),XP(c)
- Q(e);N_GUARD::R(E)+B(D),XP(c)
- Q(e);N_GUARD::R(E)+B(D),XP(a)
- R(f);N_GUARD::QAB1(A),XR(f)
- P(a);::QAR1(A)
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).