MESON Chess Problem Database
Problem Display
PID: 244435 (1b2b2K/7P/nR2P2N/R1rrk1P1/3Np3/B5p1/B2Q3n/8 w - - 0 1)
Eerkes, Allard Pieter
Norsk Sjakkblad, 1935
#2
11 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Rxd5#
- 1...Rc2
- 2.Rxd5#
- 1...Rc3
- 2.Rxd5#
- 1...Rc6
- 2.Rxd5#
- 1...Rc7
- 2.Bd6#
- 2.Rxd5#
- 1...Rc8
- 2.Rxd5#
- 1...Rd7
- 2.Sc6#
- 1...Ba4
- 2.Sf7#
- 1...Bb5
- 2.Sf7#
- 1...Bc6
- 2.Sf7#
- 1...Bd7
- 2.Sf7#
- 1...Bf7
- 2.Sxf7#
- 1...Sf1
- 2.Sg4#
- 1...Sf3
- 2.Sg4#
- 1...Sg4
- 2.Sxg4#
- 1...e3
- 2.Qxe3#
- 1...Rc1
- Tries
- 1.Sf3+?
- 1...exf3
- 2.Qe3#
- 1...Sxf3!
- 1...exf3
- 1.Bb2?
- threat
- 2.Sf3#
- 1...Rxd4
- 2.Bxd4#
- 1...Rc6
- 2.Rxd5#
- 1...Bc6
- 2.Sf7#
- 1...e3
- 2.Qxe3#
- 1...Rc3
- 2.Rxd5#
- 1...Sf3
- 2.Sxf3#
- 2.Sg4#
- 1...Bd6!
- threat
- 1.Sf3+?
- Keys
- 1.Kg8!
- threat
- 2.h8Q#
- 2.h8B#
- 1...Bf7+
- 2.Sxf7#
- 1...Rxa5
- 2.h8Q#
- 2.h8B#
- 1...Rxd4
- 2.h8Q#
- 2.h8B#
- 1...Bc6
- 2.Sf7#
- 1...e3
- 2.Qxe3#
- 1...Rc1
- 2.Rxd5#
- 2.h8Q#
- 2.h8B#
- 1...Rc2
- 2.Rxd5#
- 2.h8Q#
- 2.h8B#
- 1...Rc3
- 2.Rxd5#
- 2.h8Q#
- 2.h8B#
- 1...Rc4
- 2.h8Q#
- 2.h8B#
- 1...Rb5
- 2.h8Q#
- 2.h8B#
- 1...Rc6
- 2.Rxd5#
- 2.h8Q#
- 2.h8B#
- 1...Rc7
- 2.Bd6#
- 2.Rxd5#
- 1...Rc8
- 2.Rxd5#
- 2.h8Q#
- 2.h8B#
- 1...Rd6
- 2.h8Q#
- 2.h8B#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.h8Q#
- 2.h8B#
- 1...Bd6
- 2.h8Q#
- 2.h8B#
- 1...Ba7
- 2.h8Q#
- 2.h8B#
- 1...Bc7
- 2.h8Q#
- 2.h8B#
- 1...Ba4
- 2.Sf7#
- 2.h8Q#
- 2.h8B#
- 1...Bb5
- 2.Sf7#
- 2.h8Q#
- 2.h8B#
- 1...Bh5
- 2.h8Q#
- 2.h8B#
- 1...Bg6
- 2.h8Q#
- 2.h8B#
- 1...Bd7
- 2.Sf7#
- 2.h8Q#
- 2.h8B#
- 1...Sf1
- 2.Sg4#
- 2.h8Q#
- 2.h8B#
- 1...Sf3
- 2.Sg4#
- 2.h8Q#
- 2.h8B#
- 1...Sg4
- 2.Sxg4#
- 1...Sb4
- 2.h8Q#
- 2.h8B#
- 1...Sc7
- 2.h8Q#
- 2.h8B#
- 1...g2
- 2.h8Q#
- 2.h8B#
- threat
- 1.Kg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 10
- Sets
- R(d);OGATE,P_SPINR(e)::R1(E),XR(e)
- R(e);P_SPINR(d),S_CUTB(i)::S(D)
- B(i);N_GUARD::S(I)
- B(i);N_GUARD::S(I),XB(i)
- S(a);N_GUARD::S(I)
- S(a);N_GUARD::S(I),XS(a)
- P(c);OGATEB::QAR2(B),XP(c)
- Tries
- Try
- S(D);CHECK
- Vars
- P(c);S_CUTS(a),XS(D)::QAR2(B)
- Refutation
- S(a);XS(D)
- Try
- B(C);
- Threat
- B(C)+S(D),DCHECK
- Vars
- R(e);OGATE,P_SPINR(e),XS(D)::B(C),XR(e)
- R(d);OGATE,P_SPINR(e)::R1(E),XR(e)
- B(i);N_GUARD::S(I)
- P(c);OGATEB::QAR2(B),XP(c)
- Refutation
- B(h);
- Try
- Actual
- K(K);P-FLIGHT
- Threat
- P=Q
- Vars
- B(i);CHECK,N_GUARD::S(I),XB(i)
- R(d);XR(E)::P=Q
- R(e);P_SPINR(d),XS(D)::P=Q
- B(i);N_GUARD::S(I)
- P(c);OGATEB::QAR2(B),XP(c)
- R(d);P_SPINR(e)::P=Q
- R(d);::P=Q
- R(e);P_SPINR(d)::P=Q
- R(e);P_SPINR(d),S_CUTB(i)::S(D)
- B(h);::P=Q
- B(i);::P=Q
- S(a);N_GUARD::S(I),XS(a)
- S(g);::P=Q
- P(b);::P=Q
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).