MESON Chess Problem Database
Problem Display
PID: 71620 (2R5/3R4/8/B4p2/K2Np3/3k1r2/1pN2qQp/1B3n2 w - - 0 1)
Shanshin, Valery Yurevich
Comm., The Problemist, 2007
#2
8 + 8
| 56 | The Problemist | 2008 |
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 1...Qg1
- 2.Rc3#
- 2.Qe2#
- 1...Qe3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Sb4#
- 2.Rc3#
- 1...Qg3
- 2.Rc3#
- 2.Qe2#
- 1...Qxd4+
- 2.Rxd4#
- 1...Qh4
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qe2#
- 1...Qxc2+
- 2.Sxc2#
- 1...Qd2
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 1...Qe2
- 2.Sxe2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Qxe2#
- 1...Re3
- 2.Se1#
- 1...Sd2
- 2.Rc3#
- 1...Se3
- 2.Se1#
- 1...e3
- 2.Se1#
- 1...Qe1
- Tries
- 1.Sa1+?
- 1...Qc2+
- 2.Sdxc2#
- 1...Ke3!
- 1...Qc2+
- 1.Sa3+?
- 1...Qc2+
- 2.Sdxc2#
- 1...Ke3!
- 1...Qc2+
- 1.Se3+?
- 1...Qc2+
- 2.Sdxc2#
- 1...Kxe3!
- 1...Qc2+
- 1.Se2+?
- 1...Qd4+
- 2.Rxd4#
- 1...Kxe2!
- 1...Qd4+
- 1.Sb3+?
- 1...Qd4+
- 2.Rxd4#
- 1...Ke2!
- 1...Qd4+
- 1.Sxf3+?
- 1...Qd4+
- 2.Rxd4#
- 1...Ke2!
- 1...Qd4+
- 1.Sb5+?
- 1...Qd4+
- 2.Rxd4#
- 1...Ke2!
- 1...Qd4+
- 1.Sxf5+?
- 1...Qd4+
- 2.Sb4#
- 2.Scxd4#
- 2.Rxd4#
- 1...Ke2!
- 1...Qd4+
- 1.Sc6+?
- 1...Kc4
- 2.Se5#
- 1...Qd4+
- 2.S6b4#
- 2.Rxd4#
- 1...Ke2!
- 1...Kc4
- 1.Se6+?
- 1...Qd4+
- 2.Rxd4#
- 1...Ke2!
- 1...Qd4+
- 1.Be1?
- threat
- 2.Rc3#
- 1...Qxd4+
- 2.Rxd4#
- 1...Qxc2+
- 2.Sxc2#
- 1...Qxe1
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 1...e3
- 2.Sb4#
- 1...Qd2
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 1...Sd2!
- threat
- 1.Qxf1+?
- 1...Qe2
- 2.Sxe2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Qxe2#
- 1...Qxf1!
- 1...Qe2
- 1.Qxf2?
- threat
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qe2#
- 1...e3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Sxe3#
- 2.Sb4#
- 1...Re3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Sxe3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 1...Rg3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qxf1#
- 2.Qe2#
- 1...Rh3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qxf1#
- 2.Qe2#
- 1...Rf4
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qe2#
- 1...Sd2
- 2.Se1#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qxd2#
- 2.Qe2#
- 1...Se3
- 2.Se1#
- 2.Sxe3#
- 2.Sb4#
- 2.Rc3#
- 2.Qd2#
- 2.Qe2#
- 1...Sg3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sxf5#
- 2.Se6#
- 2.Rc3#
- 2.Qd2#
- 1...f4
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Se3#
- 2.Sb4#
- 2.Se2#
- 2.Sb3#
- 2.Sxf3#
- 2.Sb5#
- 2.Sf5#
- 2.Se6#
- 2.Rc3#
- 2.Qe2#
- 1...Rxf2!
- threat
- 1.Qg5?
- threat
- 2.Se1#
- 2.Sb4#
- 2.Rc3#
- 1...Qxd4+
- 2.Sxd4#
- 1...Qxc2+
- 2.Bxc2#
- 1...e3
- 2.Se1#
- 1...Qe1
- 2.Sxe1#
- 2.Sb4#
- 1...Qe3
- 2.Sa1#
- 2.Se1#
- 2.Sa3#
- 2.Sxe3#
- 1...Qd2
- 2.Se1#
- 2.Sb4#
- 1...Re3
- 2.Se1#
- 1...Se3
- 2.Se1#
- 1...f4
- 2.Qb5#
- 1...Rf4!
- threat
- 1.Sa1+?
- Keys
- 1.Qg8!
- threat
- 2.Qb3#
- 2.Qc4#
- 1...Qxd4+
- 2.Qc4#
- 1...Qxc2+
- 2.Qb3#
- 1...e3
- 2.Se1#
- 1...Qe1
- 2.Qc4#
- 1...Qd2
- 2.Qc4#
- 1...Sd2
- 2.Rc3#
- 1...Se3
- 2.Se1#
- 2.Qb3#
- threat
- 1.Qg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R1(G),XQ(c)
- Q(c);CHECK,P_SPINQ(c),XS(B)::R(G)+S(E),XQ(c)
- R(f);SBLOCK::B(A)+S(B),DCHECK
- S(a);SBLOCK::R1(H)
- S(a);SBLOCK::B(A)+S(B),DCHECK
- P(g);SBLOCK::B(A)+S(B),DCHECK
- Tries
- Try
- S(B);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R(G)+S(E),XQ(c)
- Refutation
- K(e);P-FLIGHT
- Try
- S(B);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R(G)+S(E),XQ(c)
- Refutation
- K(e);P-FLIGHT
- Try
- S(B);CHECK
- Vars
- Q(c);CHECK,P_SPINQ(c)::R(G)+S(E),XQ(c)
- Refutation
- K(e);P-FLIGHT,XS(B)
- Try
- S(E);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R1(G),XQ(c)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT,XS(E)
- Try
- S(E);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R1(G),XQ(c)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK,XR(f)
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R1(G),XQ(c)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R1(G),XQ(c)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK,XP(h)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK
- Vars
- K(e);S_FLIGHT::R(H)+S(E),DCHECK
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- S(E);CHECK
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c)::R1(G),XQ(c)
- Refutation
- K(e);P_SPINQ(c),S_FLIGHT
- Try
- B(F);
- Threat
- R1(H)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R1(G),XQ(c)
- Q(c);CHECK,P_SPINQ(c),XS(B)::R(G)+S(E),XQ(c)
- P(g);SBLOCK::B(A)+S(B),DCHECK
- Refutation
- S(a);
- Try
- Q(C);CHECK,XS(a)
- Refutation
- Q(c);XQ(C)
- Try
- Q(C);XQ(c)
- Threat
- DUALS(13)
- Refutation
- R(f);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,P_SPINQ(c),XS(E)::B(A)+S(B),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(B)::B(A),XQ(c)
- P(g);::B(A)+S(B),DCHECK
- R(f);::B(A)+S(B),DCHECK
- S(a);::B(A)+S(B),DCHECK
- P(h);OGATE::QAB(C)
- Refutation
- R(f);
- Try
- Actual
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,P_SPINQ(c),XS(E)::QAB1(C)
- Q(c);CHECK,P_SPINQ(c),XS(B)::QAR2(C)
- P(g);SBLOCK::B(A)+S(B),DCHECK
- Q(c);::QAB1(C)
- S(a);SBLOCK::R1(H)
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).