MESON Chess Problem Database
Problem Display
PID: 135841 (2B2nK1/5p1p/3R1N2/2P1kr2/2p1pN2/4B3/q2P2R1/3bb1nQ w - - 0 1)
Hirschenson, Aaron
Navon, Emanuel
Mat Plus, 2009
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxf4
- 2.Bd4#
- 1...Rg5+
- 2.Rxg5#
- 1...Rxf6
- 2.Rd5#
- 1...Bc2
- 2.Sg4#
- 1...Bb3
- 2.Sg4#
- 1...Ba4
- 2.Sg4#
- 1...Bg4
- 2.Sxg4#
- 1...Se2
- 2.Sg4#
- 1...Sf3
- 2.Sg4#
- 1...Se6
- 2.Sd7#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Rxf4
- Tries
- 1.Se2?
- threat
- 2.Sg4#
- 2.Bd4#
- 1...Rg5+
- 2.Rxg5#
- 1...Qxd2
- 2.Sg4#
- 1...Rxf6
- 2.Bd4#
- 1...Sxe2
- 2.Sg4#
- 1...Se6
- 2.Sg4#
- 2.Sd7#
- 1...Qa1
- 2.Sg4#
- 1...Qb2
- 2.Sg4#
- 1...Rf4
- 2.Bd4#
- 2.Bxf4#
- 1...Bf2
- 2.Sg4#
- 1...Sf3
- 2.Sg4#
- 1...h5
- 2.Bd4#
- 1...Bxe2!
- threat
- 1.Re2?
- threat
- 2.Sg4#
- 2.Qxe4#
- 1...Rxf4
- 2.Bd4#
- 1...Rxf6
- 2.Rd5#
- 1...Bxe2
- 2.Qxe4#
- 1...Se6
- 2.Sg4#
- 2.Sd7#
- 1...Qb1
- 2.Sg4#
- 1...Qc2
- 2.Sg4#
- 1...Qa8
- 2.Sg4#
- 1...Bc2
- 2.Sg4#
- 1...Sf3
- 2.Sg4#
- 1...h5
- 2.Qxe4#
- 1...Rg5+!
- threat
- 1.Rg4?
- threat
- 2.Bd4#
- 2.Qxe4#
- 1...Rg5+
- 2.Rxg5#
- 1...Qxd2
- 2.Qxe4#
- 1...Rxf4
- 2.Bd4#
- 2.Bxf4#
- 1...Rxf6
- 2.Bd4#
- 2.Rd5#
- 1...Bxg4
- 2.Sxg4#
- 2.Qxe4#
- 1...Se6
- 2.Sd7#
- 1...Qb1
- 2.Bd4#
- 1...Qa1
- 2.Qxe4#
- 1...Qb2
- 2.Qxe4#
- 1...Qc2
- 2.Bd4#
- 1...Qa8
- 2.Bd4#
- 1...Bc2
- 2.Bd4#
- 1...Bf3
- 2.Bd4#
- 1...Bf2
- 2.Qxe4#
- 1...Se2
- 2.Qxe4#
- 1...Sf3!
- threat
- 1.Rg5?
- threat
- 2.Rxf5#
- 2.Qxe4#
- 1...Se6
- 2.Sd7#
- 1...Qb1
- 2.Rxf5#
- 1...Qc2
- 2.Rxf5#
- 1...Qa8
- 2.Rxf5#
- 1...Bc2
- 2.Sg4#
- 2.Rxf5#
- 1...Bf3
- 2.Rxf5#
- 1...Bg4
- 2.Sxg4#
- 2.Qxe4#
- 1...Sf3
- 2.Sg4#
- 2.Rxf5#
- 1...Sd7
- 2.Sxd7#
- 2.Qxe4#
- 1...Rxg5+!
- threat
- 1.Rg6?
- threat
- 2.Rd5#
- 2.Qxe4#
- 1...Qxd2
- 2.Qxe4#
- 1...Rxf4
- 2.Bd4#
- 2.Rd5#
- 1...Rxf6
- 2.Rd5#
- 1...Sxg6
- 2.Sd7#
- 2.Qxe4#
- 1...fxg6
- 2.Qxe4#
- 1...hxg6
- 2.Qxe4#
- 1...Qb1
- 2.Rd5#
- 1...Qc2
- 2.Rd5#
- 1...Bc2
- 2.Sg4#
- 2.Rd5#
- 1...Bf3
- 2.Rd5#
- 1...Sf3
- 2.Sg4#
- 2.Rd5#
- 1...c3
- 2.Qxe4#
- 1...Qa8!
- threat
- 1.Re6+?
- 1...Sxe6
- 2.Sd7#
- 1...fxe6!
- 1...Sxe6
- 1.Qh2?
- threat
- 2.Sd3#
- 2.Sg6#
- 2.Bd4#
- 1...Rg5+
- 2.Sg6#
- 2.Rxg5#
- 1...Qxd2
- 2.Sd3#
- 2.Sg6#
- 1...Rxf4
- 2.Bd4#
- 2.Bxf4#
- 2.Rg5#
- 2.Qxf4#
- 1...Se6
- 2.Sd7#
- 1...Qa1
- 2.Sd3#
- 2.Sg6#
- 1...Qb2
- 2.Sd3#
- 2.Sg6#
- 1...Bf2
- 2.Sd3#
- 2.Sg6#
- 1...Se2
- 2.Sd3#
- 2.Sg6#
- 2.Sg4#
- 1...Sf3
- 2.Sd3#
- 2.Sg6#
- 2.Sg4#
- 1...Sg6
- 2.Sd3#
- 2.Sxg6#
- 2.Sd7#
- 2.Bd4#
- 1...Bg3!
- threat
- 1.Qh6?
- threat
- 2.Bd4#
- 2.Rd5#
- 1...Rg5+
- 2.Rxg5#
- 2.Qxg5#
- 1...Qa1
- 2.Rd5#
- 1...Qb2
- 2.Rd5#
- 1...Qa8
- 2.Bd4#
- 1...Bf2
- 2.Rd5#
- 1...Se2
- 2.Sg4#
- 2.Rd5#
- 1...Sf3
- 2.Sg4#
- 2.Rd5#
- 1...Se6
- 2.Sd7#
- 2.Rd5#
- 1...Sg6
- 2.Sd7#
- 2.Bd4#
- 1...c3
- 2.Bd4#
- 1...Qxd2!
- threat
- 1.Se2?
- Keys
- 1.Qxh7!
- threat
- 2.Qxf5#
- 1...Rg5+
- 2.Rxg5#
- 1...Rxf4
- 2.Bd4#
- 1...Rxf6
- 2.Rd5#
- 1...Sxh7
- 2.Sd7#
- 1...Se6
- 2.Sd7#
- 1...Rh5
- 2.Qxe4#
- 1...Bg4
- 2.Sxg4#
- 1...Sg6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- threat
- 1.Qxh7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(h);SBLOCK,XS(E)::B(D)
- R(h);CHECK,OGATEB::R(C),XR(h)
- R(h);SBLOCK,XS(H)::R1(G)
- B(a);N_GUARD::S(H)
- B(a);N_GUARD::S(H),XB(a)
- S(c);S_CUTB(a)::S(H)
- S(k);N_GUARD::S(H)
- S(k);N_GUARD::S(H),XS(k)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- R(h);CHECK,OGATEB::R(C),XR(h)
- Q(d);XP(B)::S(H)
- R(h);XS(H)::B(D)
- S(c);XS(E)::S(H)
- Q(d);::S(H)
- B(b);::S(H)
- S(c);::S(H)
- P(j);::B(D)
- Refutation
- B(a);XS(E)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(h);SBLOCK,XS(E)::B(D)
- R(h);SBLOCK,XS(H)::R1(G)
- B(a);XR(C)::QAR1(A),XP(f)
- Q(d);::S(H)
- B(a);::S(H)
- S(c);::S(H)
- P(j);::QAR1(A),XP(f)
- Refutation
- R(h);CHECK
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(h);CHECK,OGATEB::R(C),XR(h)
- Q(d);XP(B)::QAR1(A),XP(f)
- S(k);N_GUARD::S(H)
- Q(d);::B(D)
- Q(d);::QAR1(A),XP(f)
- B(a);::B(D)
- B(b);::QAR1(A),XP(f)
- S(c);::QAR1(A),XP(f)
- Refutation
- S(c);
- Try
- R(C);P_PINR(h)
- Threat
- DUALS(2)
- Vars
- S(k);N_GUARD::S(H)
- Q(d);::R1(C),XR(h)
- B(a);::R1(C),XR(h)
- Refutation
- R(h);CHECK,N_SPINR(h),XR(C)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- Q(d);XP(B)::QAR1(A),XP(f)
- R(h);XS(H)::R1(G)
- P(i);XR(C)::QAR1(A),XP(f)
- P(j);XR(C)::QAR1(A),XP(f)
- Q(d);::R1(G)
- B(a);::R1(G)
- P(e);::QAR1(A),XP(f)
- Refutation
- Q(d);
- Try
- R(G);CHECK
- Vars
- S(k);XR(G)::S(H)
- Refutation
- P(i);XR(G)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- S(k);N_GUARD::S(H)
- Refutation
- B(b);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(d);::R1(G)
- Q(d);::B(D)
- B(b);::R1(G)
- P(e);::B(D)
- Refutation
- Q(d);XP(B)
- Try
- Actual
- Q(A);XP(j)
- Threat
- QAR1(A),XR(h)
- Vars
- R(h);CHECK,OGATEB::R(C),XR(h)
- R(h);SBLOCK,XS(E)::B(D)
- R(h);SBLOCK,XS(H)::R1(G)
- S(k);N_GUARD,XQ(A)::S(H)
- S(k);N_GUARD::S(H)
- R(h);OGATE::QAR1(A),XP(f)
- B(a);N_GUARD::S(H),XB(a)
- S(k);N_GUARD::S(H),XS(k)
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).