MESON Chess Problem Database
Problem Display
PID: 169101 (4nn2/K1p3Q1/3R4/RNk1r3/3p4/PBPP4/1q2Nr1b/6B1 w - - 0 1)
Stojnic, Dragan
1st Prize, SuperProblem 103. TT, 2014
#2
11 + 9
| 56 | The Problemist | 2017 |
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.cxd4#
- 1...Qb1
- 2.cxd4#
- 1...Qa2
- 2.cxd4#
- 1...Qc2
- 2.cxd4#
- 1...Qd2
- 2.cxd4#
- 1...Qxe2
- 2.cxd4#
- 1...Qxb3
- 2.cxd4#
- 1...Rf1
- 2.Bxd4#
- 1...Rfxe2
- 2.Bxd4#
- 1...Rg2
- 2.Bxd4#
- 1...Rf3
- 2.Bxd4#
- 1...Rf4
- 2.Qxe5#
- 1...Rff5
- 2.Bxd4#
- 1...Rf6
- 2.Bxd4#
- 1...Rf7
- 2.Bxd4#
- 1...Rexe2
- 2.Qxd4#
- 1...Re3
- 2.Qxd4#
- 1...Ref5
- 2.Qxd4#
- 1...Rg5
- 2.Qxd4#
- 1...Rh5
- 2.Qxd4#
- 1...Re6
- 2.Qxd4#
- 1...Re7
- 2.Qxd4#
- 1...Bxg1
- 2.Qxe5#
- 1...Sxd6
- 2.Qxc7#
- 1...Sf6
- 2.Qxc7#
- 1...dxc3
- 2.d4#
- 1...cxd6
- 2.Sbxd4#
- 1...Qc1
- Tries
- 1.Kb7?
- threat
- 2.Rc6#
- 1...Qxb3
- 2.cxd4#
- 1...cxd6
- 2.Sbxd4#
- 2.Sa7#
- 2.Sc7#
- 1...Rf6
- 2.Bxd4#
- 1...Re6
- 2.Rd5#
- 2.Qxd4#
- 1...c6
- 2.Rxc6#
- 1...Sxd6+!
- threat
- 1.Rd5+?
- 1...Kc6
- 2.Sexd4#
- 2.Sbxd4#
- 2.Ra6#
- 1...Rxd5!
- 1...Kc6
- 1.Qxf8?
- threat
- 2.Sbxd4#
- 2.Sxc7#
- 1...Qxa3
- 2.Sxa3#
- 1...Qxc3
- 2.Sbxc3#
- 1...Qxb3
- 2.cxd4#
- 1...Rxf8
- 2.Bxd4#
- 1...Sxd6
- 2.Sbxd4#
- 1...dxc3
- 2.Sbxc3#
- 2.Sbd4#
- 2.Sxc7#
- 2.d4#
- 1...cxd6
- 2.Sbxd4#
- 1...c6
- 2.Sbxd4#
- 2.Sc7#
- 2.Rd5#
- 1...Re7!
- threat
- 1.Qd7?
- threat
- 2.Sbxd4#
- 2.Sxc7#
- 2.Rc6#
- 2.Qc6#
- 1...Qxa3
- 2.Sxa3#
- 2.Rc6#
- 2.Qc6#
- 1...Qxc3
- 2.Sbxc3#
- 2.Rc6#
- 2.Qc6#
- 1...Qxb3
- 2.Rc6#
- 2.Qc6#
- 2.cxd4#
- 1...Sxd6
- 2.Sxd6#
- 2.Qxc7#
- 1...dxc3
- 2.Sbxc3#
- 2.Sbd4#
- 2.Sxc7#
- 2.Rc6#
- 2.Qc6#
- 2.d4#
- 1...cxd6
- 2.Sbxd4#
- 2.Sxd6#
- 2.Sc7#
- 1...Rf6
- 2.Sbxd4#
- 2.Sxc7#
- 2.Bxd4#
- 2.Qc6#
- 1...Re6
- 2.Sbxd4#
- 2.Sxc7#
- 2.Rd5#
- 2.Qc6#
- 1...c6
- 2.Sbxd4#
- 2.Sc7#
- 2.Rxc6#
- 2.Qxc6#
- 1...Sxd7!
- threat
- 1.Qe7?
- threat
- 2.Sbxd4#
- 2.Sxc7#
- 1...Qxa3
- 2.Sxa3#
- 1...Qxc3
- 2.Sbxc3#
- 1...Qxb3
- 2.cxd4#
- 1...Sxd6
- 2.Sbxd4#
- 2.Qxc7#
- 1...dxc3
- 2.Sbxc3#
- 2.Sbd4#
- 2.Sxc7#
- 2.d4#
- 1...cxd6
- 2.Sbxd4#
- 1...c6
- 2.Sbxd4#
- 2.Sc7#
- 2.Rd5#
- 1...Rxe7!
- threat
- 1.Kb7?
- Keys
- 1.Sexd4!
- threat
- 2.Rc6#
- 1...Qxb3
- 2.Sxb3#
- 1...Sxd6
- 2.Qxc7#
- 1...cxd6
- 2.Sc7#
- 1...Rf6
- 2.Se6#
- 1...Re6
- 2.Rd5#
- 1...c6
- 2.Rxc6#
- threat
- 1.Sexd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 22
- Sets
- Q(a);N_GUARD::P(E),XP(d)
- Q(a);N_GUARD,XS(B)::P(E),XP(d)
- Q(a);N_GUARD,XB(D)::P(E),XP(d)
- R(b);OGATE,P_SPINP(d)::B(A),XP(d)
- R(b);OGATE,P_SPINP(d),XS(B)::B(A),XP(d)
- R(b);P_SPINP(d),S_CUTB(c)::QAR2(K),XR(f)
- R(f);OGATE,XS(B)::QAB1(K),XP(d)
- R(f);OGATE::QAB1(K),XP(d)
- B(c);N_GUARD,XB(A)::QAR2(K),XR(f)
- S(h);N_GUARD,XR(I)::QAR2(K),XP(g)
- S(h);N_GUARD::QAR2(K),XP(g)
- P(d);OGATE,P_SPINR(b),XP(E)::P(F)
- P(g);SBLOCK,XR(I)::R(G)+S(H),XP(d)
- Tries
- Try
- K(J);P-FLIGHT
- Threat
- R1(I)
- Vars
- Q(a);N_GUARD,P_PINS(H),XB(D)::P(E),XP(d)
- R(b);OGATE,P_SPINP(d)::B(A),XP(d)
- P(g);::R1(I),XP(g)
- Refutation
- S(h);CHECK,XR(I)
- Try
- R(I);CHECK
- Refutation
- R(f);XR(I)
- Try
- Q(K);XS(i)
- Threat
- DUALS(2)
- Vars
- Q(a);P_PINR(G),XP(C)::R(G)+S(H),XQ(a)
- Q(a);XP(E)::R(G)+S(H),XQ(a)
- Q(a);N_GUARD,XB(D)::P(E),XP(d)
- R(b);OGATE,P_SPINP(d),XQ(K)::B(A),XP(d)
- S(h);P_SPINS(h),XR(I)::R(G)+S(H),XP(d)
- P(g);P_SPINP(g),XR(I)::R(G)+S(H),XP(d)
- Refutation
- R(f);
- Try
- Q(K);
- Threat
- DUALS(4)
- Refutation
- S(i);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(a);P_PINR(G),XP(C)::R(G)+S(H),XQ(a)
- Q(a);XP(E)::R(G)+S(H),XQ(a)
- Q(a);N_GUARD,XB(D)::P(E),XP(d)
- P(g);P_SPINP(g),XR(I)::R(G)+S(H),XP(d)
- Refutation
- R(f);XQ(K)
- Try
- Actual
- S(B);XP(d)
- Threat
- R1(I)
- Vars
- Q(a);XB(D)::S(B),XQ(a)
- S(h);N_GUARD,XR(I)::QAR2(K),XP(g)
- P(g);SBLOCK,XR(I)::R(G)+S(H)
- R(b);::B(A)+S(B),DCHECK
- R(f);N_GUARD::R1(I)
- P(g);::R1(I),XP(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).