MESON Chess Problem Database
Problem Display
PID: 241425 (8/3p4/4pp2/3pkP1R/1Q2p3/6K1/2N5/8 w - - 0 1)
Hjelle, David
Arbejder-Skak, 1951
#2
5 + 6
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...e3
- 2.Qf4#
- 1...d4
- 2.Qxd4#
- 1...exf5
- 2.Qe7#
- 1...d6
- 2.Qd4#
- 1...e3
- Tries
- 1.Kg4?
- 1...d4
- 2.Qxd4#
- 1...e3
- 2.Qf4#
- 1...d6
- 2.Qd4#
- 1...exf5+!
- 1...d4
- 1.Rg5?
- 1...exf5
- 2.Qe7#
- 1...d4
- 2.Qxd4#
- 1...e3
- 2.Qf4#
- 1...d6
- 2.Qd4#
- 1...fxg5!
- 1...exf5
- 1.Qc3+?
- 1...d4
- 2.Qxd4#
- 1...Kd6!
- 1...d4
- 1.Qc5?
- 1...exf5
- 2.Qe7#
- 1...d6
- 2.Qd4#
- 1...e3!
- 1...exf5
- 1.Qb2+?
- 1...d4
- 2.Qxd4#
- 1...Kd6!
- 1...d4
- 1.Kg4?
- Keys
- 1.Sd4!
- 1...exf5
- 2.Rxf5#
- 1...e3
- 2.Sf3#
- 1...d6
- 2.Sc6#
- 1...exf5
- 1.Sd4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- P(a);OGATE::QAB1(C)
- P(b);::QAB1(C),XP(b)
- P(d);OGATEB,P_SPINP(d),XP(D)::QAR2(C)
- P(f);SBLOCK::QAB1(C)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- P(b);::QAB1(C),XP(b)
- P(a);OGATE::QAB1(C)
- P(f);SBLOCK::QAB1(C)
- Refutation
- P(d);CHECK,P_SPINP(d),XP(D)
- Try
- R(E);
- Vars
- P(d);OGATEB,P_SPINP(d),XP(D)::QAR2(C)
- P(b);::QAB1(C),XP(b)
- P(a);OGATE::QAB1(C)
- P(f);SBLOCK::QAB1(C)
- Refutation
- P(e);XR(E)
- Try
- Q(C);CHECK
- Vars
- P(b);P_SPINP(b)::QAB1(C),XP(b)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(C);P_PINP(b)
- Vars
- P(d);OGATEB,XP(D)::QAR2(C)
- P(f);SBLOCK::QAB1(C)
- Refutation
- P(a);
- Try
- Q(C);CHECK
- Vars
- P(b);P_SPINP(b)::QAB1(C),XP(b)
- Refutation
- K(c);S_FLIGHT
- Try
- Actual
- S(A);
- Vars
- P(d);OGATE,P_SPINP(d),XP(D)::R1(E),XP(d)
- P(a);N_GUARD::S(A)
- P(f);N_GUARD::S(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).