MESON Chess Problem Database
Problem Display
PID: 140399 (8/8/8/NQp2p2/r1R4K/p1Bk1P2/2npb1N1/2n5 w - - 0 1)
Ellerman, Arnoldo
Problemas, 1945
#2
7 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxc4+
- 2.Qxc4#
- 1...Rxc4+
- Tries
- 1.Bb2?
- threat
- 2.Rd4#
- 1...Rxc4+
- 2.Qxc4#
- 1...Sa1
- 2.Qd7#
- 1...Se1
- 2.Qd7#
- 1...Se3
- 2.Sf4#
- 1...Sb4
- 2.Rxc5#
- 1...Sd4
- 2.Rc3#
- 1...axb2!
- threat
- 1.Rxa4+?
- 1...c4
- 2.Qxc4#
- 1...Kxc3!
- 1...c4
- 1.Rb4+?
- 1...c4
- 2.Qxc4#
- 1...Kxc3!
- 1...c4
- 1.Bb2?
- Keys
- 1.Ba1!
- threat
- 2.Rd4#
- 1...Rxc4+
- 2.Qxc4#
- 1...Sxa1
- 2.Qd7#
- 1...Se1
- 2.Qd7#
- 1...Se3
- 2.Sf4#
- 1...Sb4
- 2.Rxc5#
- 1...Sd4
- 2.Rc3#
- threat
- 1.Ba1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(g);CHECK,OGATE,P_SPINR(g),XR(D)::QAB1(G),XR(g)
- Tries
- Try
- B(B);
- Threat
- QAB(G)+R(D),DCHECK
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XR(D)::QAB1(G),XR(g)
- S(b);N_GUARD::QAR(G)
- S(b);SBLOCK::S(A)
- S(b);N_PINR(D)::QAB(G)+R(D),XP(h)
- S(b);N_PINR(D),SBLOCK::QAB(G)+R(D),DCHECK
- Refutation
- P(e);XB(B)
- Try
- R(D);CHECK,N_SPINR(D),XR(g)
- Vars
- P(h);P_SPINP(h)::QAB1(G),XP(h)
- Refutation
- K(f);P-FLIGHT,XB(B)
- Try
- R(D);CHECK
- Vars
- P(h);N_PINR(D),P_SPINP(h)::QAB1(G),XP(h)
- Refutation
- K(f);P-FLIGHT,XB(B)
- Try
- Actual
- B(B);
- Threat
- QAB(G)+R(D),DCHECK
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XR(D)::QAB1(G),XR(g)
- S(b);N_GUARD,XB(B)::QAR(G)
- S(b);N_GUARD::QAR(G)
- S(b);SBLOCK::S(A)
- S(b);N_PINR(D)::QAB(G)+R(D),XP(h)
- S(b);N_PINR(D),SBLOCK::QAB(G)+R(D),DCHECK
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).