MESON Chess Problem Database
Problem Display
PID: 166761 (n2R1R2/3pNp2/2N1k3/2P1B1Kp/8/3r1Q2/6n1/5r2 w - - 0 1)
Lipton, Michael
Die Schwalbe, 2017
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Rb1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Rc1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Rfd1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Re1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Rg1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Rh1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Ra3
- 2.Qd5#
- 1...Rb3
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...d5
- 2.Rd6#
- 1...f5
- 2.Rf6#
- 1...f6+
- 2.Rxf6#
- 1...Ra1
- Tries
- 1.Sd4+?
- 1...Kxe5
- 2.Qd5#
- 1...Kxe7
- 2.Bd6#
- 2.Bf6#
- 2.Rde8#
- 2.Rfe8#
- 1...Rxd4!
- 1...Kxe5
- 1.Bd6?
- threat
- 2.Qe4#
- 1...Rd5+
- 2.Qxd5#
- 1...f6+
- 2.Rxf6#
- 1...Rdxf3
- 2.Sd4#
- 1...Re1
- 2.Qf5#
- 2.Qf6#
- 2.Qxf7#
- 1...Re3
- 2.Sd4#
- 2.Qd5#
- 1...Rd4
- 2.Sxd4#
- 1...f5
- 2.Rf6#
- 1...Rfxf3!
- threat
- 1.Bf6?
- threat
- 2.Qe4#
- 1...Rd5+
- 2.Qxd5#
- 1...Rdxf3
- 2.Sd4#
- 1...Re1
- 2.Qf5#
- 1...Re3
- 2.Sd4#
- 2.Qd5#
- 1...Rd4
- 2.Sxd4#
- 1...d5
- 2.Rd6#
- 1...Rfxf3!
- threat
- 1.Qg4+?
- 1...Rf5+
- 2.Qxf5#
- 1...f5
- 2.Rf6#
- 1...hxg4!
- 1...Rf5+
- 1.Qxd3?
- threat
- 2.Qd5#
- 2.Qd6#
- 2.Qxd7#
- 1...Rf5+
- 2.Qxf5#
- 1...dxc6
- 2.Qd6#
- 1...Rd1
- 2.Qf5#
- 1...Se3
- 2.Qd6#
- 2.Qxd7#
- 1...Sf4
- 2.Qf5#
- 2.Qd6#
- 2.Qxd7#
- 1...Sb6
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 2.Qxd7#
- 1...d5
- 2.Rd6#
- 2.Qxd5#
- 1...d6
- 2.Rxd6#
- 2.Qd5#
- 2.Qxd6#
- 1...f6+!
- threat
- 1.Qh3+?
- 1...Rf5+
- 2.Qxf5#
- 1...f5
- 2.Rf6#
- 1...Rxh3!
- 1...Rf5+
- 1.Sd4+?
- Keys
- 1.Qe4!
- threat
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 1...Rf5+
- 2.Qxf5#
- 1...Rg3+
- 2.Bxg3#
- 1...f6+
- 2.Bxf6#
- 1...Ra1
- 2.Bxa1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 2.Qf5#
- 1...Re1
- 2.Qf5#
- 1...Rf4
- 2.Bxf4#
- 1...Rf6
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bxf6#
- 2.Bc7#
- 2.Bb8#
- 1...Rc3
- 2.Bh2#
- 2.Bxc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 2.Qd5#
- 1...Re3
- 2.Qd5#
- 1...Rd4
- 2.Bxd4#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Sf4
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 2.Qf5#
- 1...Sc7
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bxc7#
- 2.Bg7#
- 2.Bh8#
- 1...d5
- 2.Rd6#
- 1...d6
- 2.Ba1#
- 2.Bb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 2.Bxd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...f5
- 2.Rf6#
- threat
- 1.Qe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- R(c);N_GUARD::QAB1(A)
- R(c);N_GUARD,P_PINB(C)::QAB1(A),XR(c)
- P(f);OGATE::R1(G)
- P(g);OGATE::R1(H)
- P(g);CHECK,OGATE::R1(H),XP(g)
- Tries
- Try
- S(E);CHECK
- Vars
- K(e);P-FLIGHT,XB(C)::QAR1(A)
- Refutation
- R(c);XS(E)
- Try
- B(C);
- Threat
- QAR2(A)
- Vars
- R(c);CHECK,N_GUARD::QAB1(A),XR(c)
- P(g);CHECK,OGATE::R1(H),XP(g)
- R(c);N_GUARD,XQ(A)::S(E)
- R(c);N_GUARD::S(E),XR(c)
- P(g);OGATE::R1(H)
- Refutation
- R(a);XQ(A)
- Try
- B(C);
- Threat
- QAR2(A)
- Vars
- R(c);CHECK,N_GUARD::QAB1(A),XR(c)
- R(c);N_GUARD,XQ(A)::S(E)
- R(a);N_GUARD::QAB1(A)
- R(c);N_GUARD::S(E),XR(c)
- P(f);OGATE::R1(G)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);CHECK
- Vars
- R(a);CHECK,N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- P(g);OGATE,P_SPINP(g)::R1(H)
- Refutation
- P(d);XQ(A)
- Try
- Q(A);XR(c)
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,N_GUARD::QAB1(A),XR(a)
- P(f);XS(E)::QAR1(A)
- R(a);N_GUARD::QAB1(A)
- S(h);::QAR1(A)
- Refutation
- P(g);CHECK
- Try
- Q(A);CHECK
- Vars
- R(a);CHECK,N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- P(g);OGATE,P_SPINP(g)::R1(H)
- Refutation
- R(c);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- DUALS(13)
- Vars
- R(a);CHECK,N_GUARD::QAB1(A),XR(a)
- R(c);CHECK::QAR(A)+B(C),XR(c)
- P(g);CHECK::QAR(A)+B(C),XP(g)
- R(a);N_GUARD::QAB1(A)
- R(a);::QAR(A)+B(C),XR(a)
- R(c);N_GUARD::QAB1(A)
- R(c);::QAR(A)+B(C),XR(c)
- R(c);N_GUARD,P_PINB(C)::QAB1(A),XR(c)
- P(f);OGATE::R1(G)
- P(g);OGATE::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).