MESON Chess Problem Database
Problem Display
PID: 83645 (1q1b4/3R4/b2nN3/r1Q4K/rn1pPB2/N2k1B2/1P6/8 w - - 0 1)
Ellerman, Arnoldo
1/2 Prize, New York Post, 1946-1948
#2
9 + 9
| 70 | American Chess Problemist | 1949 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxc5+
- 2.Sxc5#
- 1...Bb5
- 2.Qxd4#
- 1...Bg5
- 2.Qxd4#
- 1...Sd5
- 2.Qc2#
- 1...Sc4
- 2.Rxd4#
- 1...Sxe4
- 2.Rxd4#
- 1...Sb5
- 2.Qc4#
- 1...Sf5
- 2.Qc3#
- 1...Sb7
- 2.Rxd4#
- 1...Sf7
- 2.Rxd4#
- 1...Sc8
- 2.Rxd4#
- 1...Se8
- 2.Rxd4#
- 1...Rxc5+
- Keys
- 1.Bc1!
- threat
- 2.Sf4#
- 1...Rxc5+
- 2.Sxc5#
- 1...Sxe4
- 2.Rxd4#
- 1...Bg5
- 2.Qxd4#
- 1...Sd5
- 2.Qc2#
- 1...Sc4
- 2.Rxd4#
- 1...Sb5
- 2.Qc4#
- 1...Sf5
- 2.Qc3#
- 1...Sb7
- 2.Rxd4#
- 1...Sf7
- 2.Rxd4#
- 1...Sc8
- 2.Rxd4#
- 1...Se8
- 2.Rxd4#
- threat
- 1.Bc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(e);CHECK,XQ(F)::S(H),XR(e)
- B(f);N_PINQ(F)::QAR1(F),XP(d)
- B(i);N_PINQ(F)::QAR1(F),XP(d)
- S(c);N_PINQ(F)::QAB1(F)
- S(g);OGATE,P_SPINP(d)::R1(I),XP(d)
- S(g);OGATE,P_SPINP(d),XP(D)::R1(I),XP(d)
- S(g);N_PINQ(F),P_SPINP(d)::QAB1(F)
- S(g);N_PINQ(F),P_SPINP(d)::QAR1(F)
- Actual
- B(E);
- Threat
- S(H)
- Vars
- R(e);CHECK,XQ(F)::S(H),XR(e)
- S(g);OGATE,P_SPINP(d),XP(D)::R1(I),XP(d)
- B(i);N_PINQ(F)::QAR1(F),XP(d)
- S(c);N_PINQ(F)::QAB1(F)
- S(g);OGATE,P_SPINP(d)::R1(I),XP(d)
- S(g);N_PINQ(F),P_SPINP(d)::QAB1(F)
- S(g);N_PINQ(F),P_SPINP(d)::QAR1(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).