MESON Chess Problem Database
Problem Display
PID: 1169 (3n1n2/3p3p/1NpRBp1N/2P1k2K/3pPbpQ/1P1P1Rr1/1Br5/q7 w - - 0 1)
Chandrasekaran, KR
Problem Observer, 1996
#2
12 + 13
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Bxd4#
- 1...Qc1
- 2.Bxd4#
- 1...Qd1
- 2.Bxd4#
- 1...Qe1
- 2.Bxd4#
- 1...Qf1
- 2.Bxd4#
- 1...Qh1
- 2.Bxd4#
- 1...Qa2
- 2.Bxd4#
- 1...Qa3
- 2.Bxd4#
- 1...Qa5
- 2.Bxd4#
- 1...Qa6
- 2.Bxd4#
- 1...Qa7
- 2.Bxd4#
- 1...Qa8
- 2.Bxd4#
- 1...Rxb2
- 2.Sc4#
- 1...Rd2
- 2.Sc4#
- 1...Re2
- 2.Sc4#
- 1...Rf2
- 2.Sc4#
- 1...Rcg2
- 2.Sc4#
- 1...Rh2
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Rxf3
- 2.Sxg4#
- 1...Rh3
- 2.Sxg4#
- 1...Bc1
- 2.Rf5#
- 2.Qxf6#
- 1...Bd2
- 2.Rf5#
- 2.Qxf6#
- 1...Be3
- 2.Rf5#
- 2.Qxf6#
- 1...Bg5
- 2.Rf5#
- 1...Bxh6
- 2.Rf5#
- 2.Qxf6#
- 1...Sdxe6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sfxe6
- 2.Sxd7#
- 1...Sg6
- 2.Sxd7#
- 1...Qb1
- Tries
- 1.Bc4?
- threat
- 2.Qxf6#
- 1...Qh1
- 2.Bxd4#
- 1...Rh3
- 2.Sxg4#
- 1...Bg5
- 2.Rf5#
- 1...Sde6
- 2.Sf7#
- 1...Sfe6
- 2.Sxd7#
- 1...f5
- 2.Qf6#
- 1...Rh2!
- threat
- 1.Bxg4?
- threat
- 2.Qxf6#
- 1...Qh1
- 2.Bxd4#
- 1...Rh2
- 2.Sc4#
- 1...Bg5
- 2.Rf5#
- 1...Sde6
- 2.Sf7#
- 1...Sfe6
- 2.Sxd7#
- 1...f5
- 2.Qf6#
- 1...Rh3!
- threat
- 1.Bd5?
- threat
- 2.Qxf6#
- 1...Rh3
- 2.Sxg4#
- 1...Rh2
- 2.Sc4#
- 1...Bg5
- 2.Rf5#
- 1...Sde6
- 2.Sf7#
- 1...Sfe6
- 2.Sxd7#
- 1...f5
- 2.Qf6#
- 1...Qh1!
- threat
- 1.Bf5?
- threat
- 2.Qxf6#
- 1...Rh3
- 2.Sxg4#
- 1...Qh1
- 2.Bxd4#
- 1...Rh2
- 2.Sc4#
- 1...Sde6
- 2.Sf7#
- 1...Sfe6
- 2.Sxd7#
- 1...Bg5!
- threat
- 1.Bxd7?
- threat
- 2.Qxf6#
- 1...Sxd7
- 2.Sxd7#
- 1...Rh3
- 2.Sxg4#
- 1...Qh1
- 2.Bxd4#
- 1...Rh2
- 2.Sc4#
- 1...Bg5
- 2.Rf5#
- 1...Sde6
- 2.Sf7#
- 1...f5
- 2.Qf6#
- 1...Sfe6!
- threat
- 1.Bf7?
- threat
- 2.Qxf6#
- 1...Rh3
- 2.Sxg4#
- 1...Qh1
- 2.Bxd4#
- 1...Rh2
- 2.Sc4#
- 1...Bg5
- 2.Rf5#
- 1...Sfe6
- 2.Sxd7#
- 1...f5
- 2.Qf6#
- 1...Sde6!
- threat
- 1.Qg5+?
- 1...Bxg5
- 2.Rf5#
- 1...f5
- 2.Qxf5#
- 2.Qg7#
- 1...fxg5!
- 1...Bxg5
- 1.Bc4?
- Keys
- 1.Bg8!
- threat
- 2.Qxf6#
- 1...Rh3
- 2.Sxg4#
- 1...Qh1
- 2.Bxd4#
- 1...Rh2
- 2.Sc4#
- 1...Bg5
- 2.Rf5#
- 1...Sde6
- 2.Sf7#
- 1...Sfe6
- 2.Sxd7#
- 1...f5
- 2.Qf6#
- threat
- 1.Bg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 21
- Sets
- Q(a);N_GUARD::B(A),XP(d)
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,N_SPINP(d),XB(A)::S(I)
- R(b);N_GUARD::S(I)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- R(b);N_GUARD::S(I),XR(b)
- R(c);N_GUARD,XR(D)::S(L),XP(f)
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- B(e);OGATE::R1(D)
- S(l);N_GUARD,XB(K)::S(L)
- S(l);N_GUARD::S(L)
- S(l);N_GUARD::S(L),XS(l)
- S(m);N_GUARD,XB(K)::S(I),XP(j)
- S(m);N_GUARD::S(I),XP(j)
- Tries
- Try
- B(K);
- Threat
- QAB1(F),XP(i)
- Vars
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- B(e);OGATE::R1(D)
- S(l);N_GUARD::S(L)
- S(m);N_GUARD::S(I),XP(j)
- P(i);::QAB1(F)
- Refutation
- R(b);P_PINQ(F)
- Try
- B(K);XP(f)
- Threat
- QAB1(F),XP(i)
- Vars
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- B(e);OGATE::R1(D)
- S(l);N_GUARD::S(L)
- S(m);N_GUARD::S(I),XP(j)
- P(i);::QAB1(F)
- Refutation
- R(c);P_PINQ(F)
- Try
- B(K);
- Threat
- QAB1(F),XP(i)
- Vars
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- B(e);OGATE::R1(D)
- S(l);N_GUARD::S(L)
- S(m);N_GUARD::S(I),XP(j)
- P(i);::QAB1(F)
- Refutation
- Q(a);P_PINQ(F)
- Try
- B(K);
- Threat
- QAB1(F),XP(i)
- Vars
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- S(l);N_GUARD::S(L)
- S(m);N_GUARD::S(I),XP(j)
- Refutation
- B(e);
- Try
- B(K);XP(j)
- Threat
- QAB1(F),XP(i)
- Vars
- S(m);XB(K)::S(I),XS(m)
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- B(e);OGATE::R1(D)
- S(l);N_GUARD::S(L)
- P(i);::QAB1(F)
- Refutation
- S(m);
- Try
- B(K);
- Threat
- QAB1(F),XP(i)
- Vars
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- B(e);OGATE::R1(D)
- S(m);N_GUARD::S(I),XP(j)
- P(i);::QAB1(F)
- Refutation
- S(l);
- Try
- Q(F);CHECK
- Vars
- B(e);OGATE,XQ(F)::R1(D)
- Refutation
- P(i);XQ(F)
- Try
- Actual
- B(K);
- Threat
- QAB1(F),XP(i)
- Vars
- R(c);N_GUARD,P_PINQ(F)::S(L),XP(f)
- Q(a);N_GUARD,P_PINQ(F)::B(A),XP(d)
- R(b);N_GUARD,P_PINQ(F)::S(I)
- B(e);OGATE::R1(D)
- S(l);N_GUARD::S(L)
- S(m);N_GUARD::S(I),XP(j)
- P(i);::QAB1(F)
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).