MESON Chess Problem Database
Problem Display
PID: 43754 (5R2/1K2BP2/2P4R/QN3kpn/3p2N1/1q1PP2P/2B5/1b6 w - - 0 1)
Leites, Samuil Davidovich
De Problemist, 1930
#2
13 + 6
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sxd4#
- 2.Sd6#
- 1...Qxc2
- 2.Sc3#
- 2.Sxd4#
- 2.Sd6#
- 1...Qa4
- 2.Sxd4#
- 2.Sd6#
- 1...Qc4
- 2.Sxd4#
- 2.Sd6#
- 1...Qd5
- 2.Sxd4#
- 2.Sd6#
- 1...Qe6
- 2.Sxd4#
- 2.Sd6#
- 1...Qxf7
- 2.Sa3#
- 2.Sc3#
- 2.Sxd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 1...Qa3
- 2.Sxa3#
- 2.Sxd4#
- 2.Sd6#
- 1...Qc3
- 2.Sxc3#
- 2.Sxd4#
- 2.Sd6#
- 1...Qxd3
- 2.Sc3#
- 2.Sd6#
- 1...Qxb5+
- 2.Qxb5#
- 1...Sg3
- 2.Rf6#
- 1...Sf4
- 2.Rf6#
- 2.e4#
- 1...Sf6
- 2.Rxf6#
- 1...Sg7
- 2.Rf6#
- 1...Qa2
- Tries
- 1.Ka7?
- threat
- 2.Sxd4#
- 2.Sd6#
- 1...Qxd3
- 2.Sc3#
- 2.Sd6#
- 1...Qxb5
- 2.Qxb5#
- 1...Sf6
- 2.Sxd4#
- 2.Rxf6#
- 1...dxe3!
- threat
- 1.Kc7?
- threat
- 2.Sxd4#
- 2.Sd6#
- 1...Qxd3
- 2.Sc3#
- 2.Sd6#
- 1...Qxb5
- 2.Qxb5#
- 1...Sf6
- 2.Sxd4#
- 2.Rxf6#
- 1...dxe3!
- threat
- 1.Ka8?
- threat
- 2.Sxd4#
- 2.Sd6#
- 1...Qxd3
- 2.Sc3#
- 2.Sd6#
- 1...Qxb5
- 2.Qxb5#
- 1...Sf6
- 2.Sxd4#
- 2.Rxf6#
- 1...dxe3!
- threat
- 1.Bxb3?
- threat
- 2.Sa3#
- 2.Sc3#
- 2.Sxd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 2.Be6#
- 1...Bxd3
- 2.Sd6#
- 1...Ba2
- 2.Sa3#
- 2.Sc3#
- 2.Sxd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 1...Sf4
- 2.Sxd4#
- 2.Sd6#
- 2.Rf6#
- 2.e4#
- 1...Sf6
- 2.Sxd4#
- 2.Sd6#
- 2.Rxf6#
- 1...Sg7
- 2.Sa3#
- 2.Sc3#
- 2.Sxd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 2.Rf6#
- 1...dxe3!
- threat
- 1.Rg8?
- threat
- 2.Rxg5#
- 1...Qxb5+
- 2.Qxb5#
- 1...Qxd3
- 2.Sc3#
- 2.Sd6#
- 1...Sf6
- 2.Rxf6#
- 1...Sg7
- 2.Rf6#
- 1...dxe3!
- threat
- 1.Ka7?
- Keys
- 1.Bd6!
- threat
- 2.e4#
- 1...Qxf7+
- 2.Sc7#
- 1...Qxb5+
- 2.Qxb5#
- 1...Qxd3
- 2.Sc3#
- 1...dxe3
- 2.Sxe3#
- 1...Sf6
- 2.Rxf6#
- 1...Qd5
- 2.Sxd4#
- 1...Qe6
- 2.Sxd4#
- 1...Sg3
- 2.Rf6#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- S(f);N_GUARD::R1(I)
- S(f);N_GUARD::R1(I),XS(f)
- Tries
- Try
- K(J);N_SPINS(G),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(b);OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- Refutation
- P(c);XP(C)
- Try
- K(J);N_SPINS(G),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(b);OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- Refutation
- P(c);XP(C)
- Try
- K(J);N_SPINS(G),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(b);OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- Refutation
- P(c);XP(C)
- Try
- B(A);N_SPINS(G),XQ(b)
- Threat
- DUALS(7)
- Vars
- B(a);XP(B)::QAR(F)+S(G),DCHECK
- Refutation
- P(c);XP(C)
- Try
- R(M);
- Threat
- R1(M),XP(e)
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- S(f);N_GUARD::R1(I),XS(f)
- S(f);N_GUARD::R1(I)
- Refutation
- P(c);XP(C)
- Try
- Actual
- B(K);
- Threat
- P(C)
- Vars
- Q(b);CHECK,N_PINS(G),P_SPINQ(b),XP(L)::QAR(F)+S(G)
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::QAR(F),XQ(b)
- Q(b);N_PINS(G),P_SPINQ(b),XP(B)::QAR(F)+S(G)
- P(c);XP(C)::S(E),XP(c)
- S(f);N_GUARD::R1(I),XS(f)
- Q(b);N_PINS(G),P_PINP(H)::S(G),XP(c)
- Q(b);N_PINS(G)::QAR(F)+S(G),DCHECK,XP(c)
- S(f);N_GUARD::R1(I)
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).