MESON Chess Problem Database
Problem Display
PID: 239515 (5Nn1/8/5pN1/Rqb1Bk1K/6p1/3P2p1/8/1Q6 w - - 0 1)
Hermanson, Halvar
Magyar Sakkelet, 1962
#2
7 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxd3
- 2.Qxd3#
- 1...Qc4
- 2.dxc4#
- 1...Qd7
- 2.d4#
- 1...Qe8
- 2.d4#
- 1...Qxa5
- 2.d4#
- 1...Ba3
- 2.Qf1#
- 1...Bb4
- 2.Qf1#
- 1...Bd6
- 2.Qf1#
- 1...Be7
- 2.Qf1#
- 1...Qxd3
- Tries
- 1.Bxg3?
- threat
- 2.Sh4#
- 1...Qxd3
- 2.Qxd3#
- 1...Qe8
- 2.Qf1#
- 1...Bxf8!
- threat
- 1.Bc7?
- threat
- 2.Sh4#
- 1...Qxd3
- 2.Qxd3#
- 1...Qe8
- 2.Qf1#
- 1...Bd6
- 2.d4#
- 1...Bxf8!
- threat
- 1.d4+?
- 1...Qd3
- 2.Qxd3#
- 1...Qxb1!
- 1...Qd3
- 1.Bxg3?
- Keys
- 1.Bd6!
- threat
- 2.Sh4#
- 1...Qxd3
- 2.Qxd3#
- 1...Bxd6
- 2.d4#
- 1...Qe8
- 2.Qf1#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- Q(c);OGATE,P_SPINQ(c),XP(B)::QAB(A),XQ(c)
- Q(c);OGATE::QAB(A)+P(B),XQ(c)
- Q(c);N_GUARD::QAB(A)+P(B)
- Q(c);N_GUARD,P_PINS(F)::QAB(A)+P(B)
- Q(c);N_GUARD,XR(C)::QAB(A)+P(B)
- B(d);N_GUARD::QAR(A)
- Tries
- Try
- B(D);XP(a)
- Threat
- S(F)
- Vars
- Q(c);OGATE,P_SPINB(d),P_SPINQ(c),XP(B)::QAB(A),XQ(c)
- Q(c);P_PINS(F),P_SPINB(d)::QAR(A)
- Refutation
- B(d);P_SPINQ(c),XS(G)
- Try
- B(D);
- Threat
- S(F)
- Vars
- Q(c);OGATE,P_SPINB(d),P_SPINQ(c),XP(B)::QAB(A),XQ(c)
- Q(c);P_PINS(F),P_SPINB(d)::QAR(A)
- B(d);P_SPINQ(c)::QAB(A)+P(B)
- Refutation
- B(d);P_SPINQ(c),XS(G)
- Try
- P(B);CHECK
- Vars
- Q(c);N_GUARD,P_SPINQ(c)::QAB(A),XQ(c)
- Refutation
- Q(c);XQ(A)
- Try
- Actual
- B(D);
- Threat
- S(F)
- Vars
- Q(c);OGATE,P_SPINB(d),P_SPINQ(c),XP(B)::QAB(A),XQ(c)
- B(d);P_SPINQ(c),XB(D)::QAB(A)+P(B)
- Q(c);P_PINS(F),P_SPINB(d)::QAR(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).