MESON Chess Problem Database
Problem Display
PID: 80448 (8/4b2N/3p4/R2prk1B/Q4N2/3Kp3/8/8 w - - 0 1)
Ellerman, Arnoldo
Comm., Good Companions (January), 1923
#2
6 + 6
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Qxe4#
- 1...Re4
- Tries
- 1.Sg2?
- threat
- 2.Qg4#
- 1...Re4
- 2.Qxe4#
- 1...Re6
- 2.Qf4#
- 1...d4
- 2.Qd7#
- 1...Ke6!
- threat
- 1.Sh3?
- threat
- 2.Qg4#
- 1...Re4
- 2.Qxe4#
- 1...Re6
- 2.Qf4#
- 1...d4
- 2.Qd7#
- 1...Ke6!
- threat
- 1.Sg6?
- threat
- 2.Qg4#
- 1...Re4
- 2.Qxe4#
- 1...d4
- 2.Qd7#
- 1...Ke6!
- threat
- 1.Qd7+?
- 1...Kxf4
- 2.Qg4#
- 1...Re6!
- 1...Kxf4
- 1.Sg2?
- Keys
- 1.Se2!
- threat
- 2.Qg4#
- 1...Ke6
- 2.Sd4#
- 1...Re4
- 2.Qxe4#
- 1...Re6
- 2.Qf4#
- 1...d4
- 2.Qd7#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD,P_SPINP(b)::QAB1(B),XR(c)
- Tries
- Try
- S(C);
- Threat
- QAB1(B)
- Vars
- R(c);N_GUARD,P_SPINP(b)::QAB1(B),XR(c)
- R(c);P_SPINP(b),SBLOCK::QAR1(B)
- P(b);P_SPINR(c)::QAB(B)
- Refutation
- K(d);S_FLIGHT
- Try
- S(C);
- Threat
- QAB1(B)
- Vars
- R(c);N_GUARD,P_SPINP(b)::QAB1(B),XR(c)
- R(c);P_SPINP(b),SBLOCK::QAR1(B)
- P(b);P_SPINR(c)::QAB(B)
- Refutation
- K(d);S_FLIGHT
- Try
- S(C);
- Threat
- QAB1(B)
- Vars
- R(c);N_GUARD,P_SPINP(b)::QAB1(B),XR(c)
- P(b);P_SPINR(c)::QAB(B)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(B);CHECK
- Vars
- K(d);OGATE,P-FLIGHT,XS(C)::QAR1(B)
- Refutation
- R(c);P_SPINP(b),P_SPINR(c)
- Try
- Actual
- S(C);
- Threat
- QAB1(B)
- Vars
- K(d);S_FLIGHT::S(C)
- R(c);N_GUARD,P_SPINP(b)::QAB1(B),XR(c)
- R(c);P_SPINP(b),SBLOCK::QAR1(B)
- P(b);P_SPINR(c)::QAB(B)
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).