MESON Chess Problem Database
Problem Display
PID: 252082 (1B2b3/2Nq1p2/R4P2/2P1k3/4N2p/1P1p3p/3P3K/5RQB w - - 0 1)
Nerong, Otto
Die Schwalbe, 1930
#2
12 + 7
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Qg5#
- 1...Qd4
- Tries
- 1.Sc3?
- threat
- 2.Qe3#
- 1...Qa4
- 2.S7b5#
- 2.S7d5#
- 2.Se6#
- 2.Sa8#
- 2.Sxe8#
- 1...Qg4
- 2.S7b5#
- 2.S7d5#
- 2.Se6#
- 2.Sa8#
- 2.Sxe8#
- 1...Qf5
- 2.S7b5#
- 2.S7d5#
- 2.Sa8#
- 2.Sxe8#
- 1...Qd4
- 2.S7d5#
- 2.Qg5#
- 1...Qd5
- 2.S7xd5#
- 1...Qc6!
- threat
- 1.Sg3?
- threat
- 2.Qe3#
- 1...Qa4
- 2.Sb5#
- 2.Sd5#
- 2.Se6#
- 2.Sa8#
- 2.Sxe8#
- 2.Rf5#
- 1...Qg4
- 2.Sb5#
- 2.Sd5#
- 2.Se6#
- 2.Sa8#
- 2.Sxe8#
- 1...Qf5
- 2.Sb5#
- 2.Sd5#
- 2.Sa8#
- 2.Sxe8#
- 2.Rxf5#
- 1...Qc6
- 2.Rf5#
- 1...Qd4
- 2.Sd5#
- 2.Rf5#
- 1...Qd5
- 2.Sxd5#
- 2.Rf5#
- 1...hxg3+!
- threat
- 1.Sg5?
- threat
- 2.Qe3#
- 1...Qa4
- 2.Sb5#
- 2.Sd5#
- 2.Sce6#
- 2.Sa8#
- 2.Sxe8#
- 1...Qg4
- 2.Sb5#
- 2.Sd5#
- 2.Sce6#
- 2.Sa8#
- 2.Sxe8#
- 1...Qf5
- 2.Sb5#
- 2.Sd5#
- 2.Sa8#
- 2.Sxe8#
- 1...Qd4
- 2.Sd5#
- 1...Qd5
- 2.Sxd5#
- 1...Qc6!
- threat
- 1.Sd6?
- threat
- 2.Sc4#
- 2.Qe3#
- 1...Qxd6
- 2.Qe3#
- 1...Qf5
- 2.Sc4#
- 2.Rxf5#
- 1...Qc6
- 2.Sc4#
- 2.Rf5#
- 1...Qa4
- 2.Rf5#
- 1...Qb5
- 2.Rf5#
- 2.Qe3#
- 1...Qe6
- 2.Qe3#
- 1...Qg4!
- threat
- 1.Sb5+?
- 1...Kd5
- 2.Sec3#
- 2.Sg3#
- 2.Sg5#
- 2.Sbc3#
- 2.Qd4#
- 1...Qc7
- 2.Qd4#
- 2.Qg5#
- 1...Qd6!
- 1...Kd5
- 1.Se6+?
- 1...Kd5
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.S4g5#
- 2.Sf4#
- 2.Rf5#
- 2.Qd4#
- 2.Qg5#
- 1...Qc7
- 2.Qd4#
- 2.Qg5#
- 1...Qd6!
- 1...Kd5
- 1.Rf5+?
- 1...Kxf5
- 2.Qg5#
- 1...Qxf5!
- 1...Kxf5
- 1.Rd6?
- threat
- 2.Qd4#
- 1...Qa4
- 2.Rd5#
- 2.Qg5#
- 1...Qxd6!
- threat
- 1.Sc3?
- Keys
- 1.Sf2!
- 1...Kd4
- 2.Sg4#
- 1...Kf4
- 2.Sxd3#
- 1...Kf5
- 2.Sxd3#
- 1...Qxc7
- 2.Sxd3#
- 2.Sg4#
- 1...Qc6
- 2.Sxd3#
- 2.Sg4#
- 1...Qe6
- 2.Sxd3#
- 1...Qd6
- 2.Sg4#
- 1...Qa4
- 2.Sxd3#
- 1...Qg4
- 2.Sxd3#
- 2.Sxg4#
- 1...Qb5
- 2.Sg4#
- 1...Qf5
- 2.Sb5#
- 1...Qc8
- 2.Sxd3#
- 1...Qd4
- 2.Qg5#
- 1...Qd5
- 2.Sg4#
- 1...Qe7
- 2.Sxd3#
- 2.Sg4#
- 1...Qd8
- 2.Sg4#
- 1...Kd4
- 1.Sf2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 0
- Sets
- Q(e);N_GUARD,SBLOCK::QAR2(B)
- Tries
- Try
- S(G);
- Threat
- QAR2(B)
- Vars
- Q(e);N_GUARD::B(L)+S(K),XQ(e)
- Refutation
- Q(e);
- Try
- S(G);
- Threat
- QAR2(B)
- Vars
- Q(e);N_GUARD::R1(A)
- Refutation
- P(c);CHECK,XS(G)
- Try
- S(G);
- Threat
- QAR2(B)
- Vars
- Q(e);N_GUARD::B(L)+S(K)
- Q(e);N_GUARD::B(L)+S(K),XQ(e)
- Refutation
- Q(e);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(e);XS(G)::QAR2(B)
- Q(e);N_GUARD::R1(A)
- Q(e);::QAR2(B)
- Refutation
- Q(e);
- Try
- S(K);CHECK
- Refutation
- Q(e);P_SPINQ(e)
- Try
- S(K);CHECK
- Refutation
- Q(e);P_SPINQ(e)
- Try
- R(A);CHECK
- Vars
- K(d);N_GUARD,P-FLIGHT,S_CUTQ(e),XR(A)::QAR1(B)
- Refutation
- Q(e);XR(A)
- Try
- R(I);
- Threat
- QAB1(B)
- Refutation
- Q(e);XR(I)
- Try
- Actual
- S(G);
- Vars
- K(d);S_CUTQ(e),S_FLIGHT::QAB(B)+S(G)
- K(d);S_FLIGHT::R(A)+S(G),DCHECK,XP(a)
- K(d);P-FLIGHT,S_CUTQ(e)::R(A)+S(G),XP(a)
- Q(e);N_GUARD::S(G),XP(a)
- Q(e);N_GUARD::S(G)
- Q(e);N_GUARD,SBLOCK::B(L)+S(K)
- Q(e);N_GUARD,SBLOCK::QAR2(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).