MESON Chess Problem Database
Problem Display
PID: 250236 (8/BBN1p1K1/4PQn1/2r4p/1bp4r/1Rq1k3/3Rnp2/1N6 w - - 0 1)
Sonnenfeld, Pal
1st Prize, Nepszava, 1927
#2
9 + 11
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxb3
- 2.Qf3#
- 1...Rd4
- 2.Qf3#
- 1...Re4
- 2.Sd5#
- 1...Sd4
- 2.Qxf2#
- 1...Sef4
- 2.Qd4#
- 1...Sgf4
- 2.Qe5#
- 1...Qxb3
- Tries
- 1.Bxc5+?
- 1...Rd4
- 2.Qf3#
- 1...Sd4
- 2.Qxf2#
- 2.Qf3#
- 1...Bxc5!
- 1...Rd4
- 1.Bh1?
- threat
- 2.Sd5#
- 1...Rd4
- 2.Qf3#
- 1...Sd4
- 2.Qxf2#
- 1...Sef4
- 2.Qd4#
- 1...Sgf4
- 2.Qe5#
- 1...Rxh1!
- threat
- 1.Rxc3+?
- 1...Sxc3
- 2.Qxf2#
- 2.Qf3#
- 1...Bxc3!
- 1...Sxc3
- 1.Bxc5+?
- Keys
- 1.Bg2!
- threat
- 2.Sd5#
- 1...Rd4
- 2.Qf3#
- 1...Sd4
- 2.Qxf2#
- 1...Sef4
- 2.Qd4#
- 1...Sgf4
- 2.Qe5#
- threat
- 1.Bg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(c);N_PINQ(E),N_SPINQ(c),XR(C)::QAR1(E)
- R(g);N_PINQ(E),N_SPINR(h)::QAR1(E)
- R(g);SBLOCK::S(H)
- S(a);N_PINQ(E),N_SPINR(h)::QAB1(E),XP(b)
- S(a);N_GUARD,S_CUTR(g)::QAB1(E)
- S(j);N_GUARD,S_CUTR(g)::QAR2(E)
- Tries
- Try
- B(F);CHECK,XR(h)
- Vars
- R(g);N_PINQ(E),P_SPINR(g)::QAR1(E)
- Refutation
- B(e);XB(F)
- Try
- B(G);
- Threat
- S(H)
- Vars
- R(g);N_PINQ(E),N_SPINR(h)::QAR1(E)
- S(a);N_PINQ(E),N_SPINR(h)::QAB1(E),XP(b)
- S(a);N_GUARD,S_CUTR(g)::QAB1(E)
- S(j);N_GUARD,S_CUTR(g)::QAR2(E)
- Refutation
- R(g);XB(G)
- Try
- R(C);CHECK,N_SPINQ(E),XQ(c)
- Refutation
- B(e);P_PINQ(E),XR(C)
- Try
- Actual
- B(G);
- Threat
- S(H)
- Vars
- R(g);N_PINQ(E),N_SPINR(h)::QAR1(E)
- S(a);N_PINQ(E),N_SPINR(h)::QAB1(E),XP(b)
- S(a);N_GUARD,S_CUTR(g)::QAB1(E)
- S(j);N_GUARD,S_CUTR(g)::QAR2(E)
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).