MESON Chess Problem Database
Problem Display
PID: 138694 (4R3/K1N5/B1R2pP1/3N1P1q/P2kn3/2pr3p/1n1P1P1B/1b1Q4 w - - 0 1)
Witt, Andreas
StrateGems, 2010
#2
13 + 9
SOLUTION
- SOUND
- Sets
- 1...Re3
- 2.dxc3#
- 2.dxe3#
- 2.fxe3#
- 1...Rf3
- 2.dxc3#
- 1...Rg3
- 2.dxc3#
- 1...Sxd1
- 2.Rc4#
- 1...Sxa4
- 2.Rc4#
- 2.Qxa4#
- 1...Sc4
- 2.Rxc4#
- 1...Sxf2
- 2.dxc3#
- 1...Sg3
- 2.dxc3#
- 1...Sc5
- 2.dxc3#
- 1...Sg5
- 2.dxc3#
- 1...Sd6
- 2.dxc3#
- 1...Re3
- Tries
- 1.Sxc3?
- threat
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 2.Rxe4#
- 1...Qxf5
- 2.Se2#
- 1...Rxd2
- 2.Se6#
- 1...Rxc3
- 2.dxc3#
- 1...Sxd2
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 2.Rd8#
- 1...Sxf2
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 2.Rd8#
- 1...Sxc3
- 2.dxc3#
- 1...Qe2
- 2.Sxe2#
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 1...Qf3
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 1...Qg4
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 1...Qh4
- 2.Se2#
- 2.S3b5#
- 2.S7b5#
- 2.Se6#
- 1...Qh7
- 2.Se2#
- 2.Sb5#
- 2.Rxe4#
- 1...Re3
- 2.Se6#
- 2.dxe3#
- 2.fxe3#
- 1...Rf3
- 2.Se2#
- 2.Se6#
- 1...Ba2
- 2.S3b5#
- 2.S7b5#
- 2.Rxe4#
- 1...Sg3
- 2.S3b5#
- 2.S7b5#
- 1...Sc5
- 2.Rd6#
- 1...Sg5
- 2.S3b5#
- 2.S7b5#
- 2.Rd8#
- 1...Sd6
- 2.Se6#
- 1...Rg3!
- threat
- 1.Se3?
- threat
- 2.Sb5#
- 2.Se6#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxd2
- 2.Se6#
- 1...Rxe3
- 2.dxc3#
- 2.dxe3#
- 2.fxe3#
- 1...Sxd2
- 2.Sb5#
- 1...Sxf2
- 2.Sb5#
- 2.dxc3#
- 1...Ba2
- 2.Sc2#
- 2.Sb5#
- 1...Sg3
- 2.Sb5#
- 2.dxc3#
- 1...Sc5
- 2.Sb5#
- 2.Rd6#
- 1...Sg5
- 2.Sb5#
- 2.dxc3#
- 1...Sd6
- 2.dxc3#
- 1...Qh7!
- threat
- 1.Sxf6?
- threat
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 2.Rxe4#
- 1...Rxd2
- 2.Se6#
- 2.Be5#
- 1...Sxd2
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 2.Rd8#
- 1...Sxf2
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 2.Rd8#
- 2.dxc3#
- 1...Sxf6
- 2.dxc3#
- 1...Qh7
- 2.Be5#
- 2.Rxe4#
- 1...Qe2
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 1...Qf3
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 1...Qg4
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 1...Qh4
- 2.Sb5#
- 2.Se6#
- 2.Be5#
- 1...Re3
- 2.Se6#
- 2.Be5#
- 2.dxc3#
- 2.dxe3#
- 2.fxe3#
- 1...Rf3
- 2.Se6#
- 2.Be5#
- 2.dxc3#
- 1...Rg3
- 2.dxc3#
- 1...Ba2
- 2.Sb5#
- 2.Be5#
- 2.Rxe4#
- 1...Sc4
- 2.Sb5#
- 2.Se6#
- 2.Rxc4#
- 2.Rxe4#
- 1...Sg3
- 2.Sb5#
- 2.dxc3#
- 1...Sc5
- 2.Be5#
- 2.Rd6#
- 1...Sg5
- 2.Sb5#
- 2.Be5#
- 2.Rd8#
- 2.dxc3#
- 1...Sd6
- 2.Se6#
- 2.Be5#
- 2.dxc3#
- 1...Qxf5!
- threat
- 1.Sxc3?
- Keys
- 1.Sf4!
- threat
- 2.Sfe6#
- 2.Sb5#
- 1...Qxf5
- 2.Se2#
- 1...Sxd2
- 2.Sb5#
- 1...Sxf2
- 2.Sb5#
- 2.dxc3#
- 1...Qh7
- 2.Se2#
- 2.Se6#
- 1...Rg3
- 2.Sb5#
- 2.dxc3#
- 1...Ba2
- 2.Sb5#
- 1...Sg3
- 2.Sb5#
- 2.dxc3#
- 1...Sc5
- 2.Rd6#
- 1...Sg5
- 2.Sb5#
- 2.dxc3#
- 1...Sd6
- 2.dxc3#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(d);::QAR(A)+P(B)DCHECK,XP(c)
- S(b);N_GUARD,XQ(A)::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(g);N_GUARD,XP(C)::P(B),XP(c)
- S(g);N_GUARD::P(B),XP(c)
- Tries
- Try
- S(F);XP(c)
- Threat
- DUALS(4)
- Vars
- Q(h);N_GUARD,XP(G)::S(F)
- R(d);P_SPINR(d),XP(B)::S(L)
- R(d);OGATE,XS(F)::QAR(A)+P(B)DCHECK,XR(d)
- S(g);OGATE,XS(F)::P(B),XS(g)
- S(g);N_GUARD,SBLOCK::R(I)
- S(g);::S(L)
- Refutation
- R(d);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(h);XP(G)::S(F),XQ(h)
- R(d);P_SPINR(d),XP(B)::S(L)
- S(g);XP(B)::S(L)
- S(g);N_GUARD::P(B),XP(c)
- Refutation
- Q(h);P_PINS(L)
- Try
- S(F);XP(i)
- Threat
- DUALS(4)
- Vars
- S(g);N_GUARD,XS(F)::P(B),XP(c)
- R(d);::QAR(A)+P(B)DCHECK,XP(c)
- Refutation
- Q(h);XP(G)
- Try
- Actual
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(h);N_GUARD,XP(G)::S(F)
- S(g);XP(B)::S(L)
- B(a);::S(L)
- S(g);N_GUARD,SBLOCK::R(I)
- S(g);N_GUARD::P(B),XP(c)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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