MESON Chess Problem Database
Problem Display
PID: 11873 (n7/7K/1n1P4/BB4R1/1RPkP1QN/5pN1/3PP3/1br2rb1 w - - 0 1)
Krishnamurthy, Thiruvannam S
Narayanan, Chithathuz Gopatan Sathya
4th Prize, The Problemist, 1972
#2
13 + 8
| 273 | Mat Plus | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Sxf3#
- 1...Re1
- 2.Sxf3#
- 1...Bxe4+
- 2.Qxe4#
- 1...Bf2
- 2.Sxf3#
- 1...Sa4
- 2.Rd5#
- 1...Sxc4
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...Sc8
- 2.Rd5#
- 1...Sc7
- 2.Bxb6#
- 1...f2
- 2.Sf3#
- 1...Rd1
- Tries
- 1.Rb3?
- 1...Bxe4+
- 2.Qxe4#
- 1...Sxc4
- 2.Rd5#
- 1...fxe2
- 2.Sxe2#
- 1...Sd5
- 2.Rxd5#
- 1...Rcd1
- 2.Bc3#
- 1...Rce1
- 2.Bc3#
- 1...Rc2
- 2.Rd3#
- 1...Rc3
- 2.Bxc3#
- 1...Rfd1
- 2.Sxf3#
- 1...Rfe1
- 2.Sxf3#
- 1...Rf2
- 2.e3#
- 1...Ba2
- 2.Rd3#
- 1...Bc2
- 2.Bc3#
- 1...Bd3
- 2.Rxd3#
- 1...Bf2
- 2.Sxf3#
- 1...Bh2
- 2.e3#
- 1...Be3
- 2.dxe3#
- 1...Sa4
- 2.Rd5#
- 1...Sd7
- 2.Rd5#
- 1...Sc8
- 2.Rd5#
- 1...Sc7
- 2.Bxb6#
- 1...f2
- 2.Sf3#
- 2.e3#
- 1...Rxc4!
- 1...Bxe4+
- 1.Rf5?
- threat
- 2.Qg7#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...fxe2!
- threat
- 1.Rh5?
- threat
- 2.Qg7#
- 1...Bxe4+
- 2.Qxe4#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...fxe2!
- threat
- 1.Qf5?
- threat
- 2.Qc5#
- 2.Qe5#
- 2.Qf6#
- 1...Bxe4
- 2.Qxe4#
- 1...Sd5
- 2.Qxd5#
- 1...Sa4
- 2.Qd5#
- 2.Qe5#
- 2.Qf6#
- 1...Sd7
- 2.Qd5#
- 1...fxe2!
- threat
- 1.Qe6?
- threat
- 2.Qe5#
- 2.Qf6#
- 1...Bxe4+
- 2.Qxe4#
- 1...Sd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sd7
- 2.Rd5#
- 2.Qd5#
- 1...fxe2!
- threat
- 1.Qf4?
- threat
- 2.Qe5#
- 2.Qf6#
- 1...Bxe4+
- 2.Qxe4#
- 1...Sd5
- 2.Rxd5#
- 1...Sd7
- 2.Rd5#
- 1...fxe2!
- threat
- 1.c5+?
- 1...Sc4
- 2.Rd5#
- 1...Rc4!
- 1...Sc4
- 1.Rb3?
- Keys
- 1.Qxf3!
- 1...Bxe4+
- 2.Qxe4#
- 1...Rxc4
- 2.Qc3#
- 1...Rxf3
- 2.Sxf3#
- 1...Sxc4
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Rcd1
- 2.Qc3#
- 1...Rce1
- 2.Qc3#
- 1...Rc2
- 2.Qd3#
- 1...Rc3
- 2.Qxc3#
- 2.dxc3#
- 1...Rfd1
- 2.Qf6#
- 1...Rfe1
- 2.Qf6#
- 1...Rf2
- 2.Qe3#
- 1...Ba2
- 2.Qd3#
- 1...Bc2
- 2.Qc3#
- 1...Bd3
- 2.Qxd3#
- 1...Bf2
- 2.Qf6#
- 1...Bh2
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Sa4
- 2.Rd5#
- 1...Sd7
- 2.Rd5#
- 1...Sc8
- 2.Rd5#
- 1...Sc7
- 2.Bxb6#
- 1...Bxe4+
- 1.Qxf3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 11
- REMOVED MATES = 1
- Sets
- R(c);N_GUARD::S(H),XP(e)
- B(a);CHECK,OGATE,P_SPINB(a),XP(F)::QAR1(G),XB(a)
- B(d);S_CUTR(c)::S(H),XP(e)
- S(g);N_GUARD::R1(K)
- S(g);N_GUARD,P_SPINS(g),XP(E)::R1(K)
- S(g);N_GUARD::R1(K),XS(g)
- S(h);N_GUARD::B(I),XS(g)
- P(e);S_CUTR(c)::S(H)
- Tries
- Try
- R(D);
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(F)::QAR1(G),XB(a)
- S(g);N_GUARD,XP(E)::R1(K)
- P(e);XP(B)::S(C),XP(e)
- S(g);N_GUARD::R1(K),XS(g)
- R(b);N_GUARD::B(I)
- R(b);N_PINP(F),S_CUTB(a)::R1(D)
- R(b);N_GUARD::B(I),XR(b)
- R(c);N_GUARD::S(H),XP(e)
- R(c);S_CUTB(d)::P(B)
- B(a);N_GUARD,N_PINP(F)::R1(D)
- B(a);S_CUTR(b)::B(I)
- B(a);N_GUARD::R1(D),XB(a)
- B(d);S_CUTR(c)::S(H),XP(e)
- B(d);N_GUARD::P(B)
- B(d);OGATE::P(A),XB(d)
- S(g);N_GUARD::R1(K)
- S(h);N_GUARD::B(I),XS(g)
- Refutation
- R(b);XP(E)
- Try
- R(K);N_SPINP(F)
- Threat
- QAB(G)
- Vars
- S(g);N_GUARD::R1(K),XS(g)
- S(g);N_GUARD::R1(K)
- Refutation
- P(e);XP(B)
- Try
- R(K);
- Threat
- QAB(G)
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(F)::QAR1(G),XB(a)
- S(g);N_GUARD::R1(K),XS(g)
- S(g);N_GUARD::R1(K)
- Refutation
- P(e);XP(B)
- Try
- Q(G);N_SPINP(F)
- Threat
- DUALS(3)
- Vars
- B(a);OGATE,P_PINQ(G),XP(F)::QAR1(G),XB(a)
- S(g);N_GUARD::QAR1(G),XS(g)
- S(g);N_GUARD::QAR1(G)
- Refutation
- P(e);XP(B)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,OGATE,XP(F)::QAR1(G),XB(a)
- Refutation
- P(e);XP(B)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,OGATE,P_SPINB(a),XP(F)::QAR1(G),XB(a)
- S(g);N_GUARD::R1(K),XS(g)
- S(g);N_GUARD::R1(K)
- Refutation
- P(e);XP(B)
- Try
- P(E);CHECK
- Vars
- S(g);P_SPINS(g)::R1(K)
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- Q(G);XP(e)
- Vars
- B(a);CHECK,OGATE,XP(F)::QAR1(G),XB(a)
- R(b);N_GUARD,P_SPINR(b),XP(E)::QAB1(G)
- R(c);XQ(G)::S(H),XR(c)
- S(g);N_GUARD,P_SPINS(g),XP(E)::R1(K)
- S(g);N_GUARD::R1(K),XS(g)
- R(b);N_GUARD::QAB1(G)
- R(b);N_PINP(F),S_CUTB(a)::QAR1(G)
- R(c);N_GUARD::QAB(G)
- R(c);S_CUTB(d)::QAB1(G)
- B(a);N_GUARD,N_PINP(F)::QAR1(G)
- B(a);S_CUTR(b)::QAB1(G)
- B(a);N_GUARD::QAR1(G),XB(a)
- B(d);S_CUTR(c)::QAB(G)
- B(d);N_GUARD::QAB1(G)
- B(d);N_GUARD::QAB1(G),XB(d)
- S(g);N_GUARD::R1(K)
- S(h);N_GUARD::B(I),XS(g)
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).