MESON Chess Problem Database
Problem Display
PID: 251060 (1b4b1/6pq/P3R3/1P1k2P1/nK1Nr1Q1/3R1nB1/4N1B1/8 w - - 0 1)
Umnov, Evgeny Ivanovich
Die Schwalbe, 1930
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qxe4#
- 1...Qh2
- 2.Qxe4#
- 1...Qh3
- 2.Qxe4#
- 1...Qh5
- 2.Qxe4#
- 1...Qh6
- 2.Qxe4#
- 1...Qh8
- 2.Qxe4#
- 1...Rxd4+
- 2.Rxd4#
- 1...Rxe6
- 2.Sf5#
- 1...Bd6+
- 2.Rxd6#
- 1...Ba7
- 2.Rd6#
- 1...Sxd4
- 2.Rxd4#
- 1...Se5
- 2.Sf4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...g6
- 2.Qxe4#
- 1...Qh1
- Keys
- 1.a7!
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxd4+
- 2.Rxd4#
- 1...Bd6+
- 2.Rxd6#
- 1...Rxe2
- 2.a8Q#
- 2.a8B#
- 1...Rxg4
- 2.a8Q#
- 2.a8B#
- 1...Rxe6
- 2.Sf5#
- 1...Bxg3
- 2.a8Q#
- 2.a8B#
- 1...Bxa7
- 2.Rd6#
- 1...Bxe6
- 2.a8Q#
- 2.a8B#
- 1...Sxd4
- 2.Rxd4#
- 2.a8Q#
- 2.a8B#
- 1...Sxg5
- 2.a8Q#
- 2.a8B#
- 1...Qf5
- 2.a8Q#
- 2.a8B#
- 1...Qg6
- 2.a8Q#
- 2.a8B#
- 1...Qh1
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Qh4
- 2.a8Q#
- 2.a8B#
- 1...Qh5
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Qh6
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Qh8
- 2.Qxe4#
- 2.a8Q#
- 2.a8B#
- 1...Re3
- 2.a8Q#
- 2.a8B#
- 1...Rf4
- 2.a8Q#
- 2.a8B#
- 1...Re5
- 2.a8Q#
- 2.a8B#
- 1...Bf4
- 2.a8Q#
- 2.a8B#
- 1...Be5
- 2.a8Q#
- 2.a8B#
- 1...Bc7
- 2.a8Q#
- 2.a8B#
- 1...Bf7
- 2.a8Q#
- 2.a8B#
- 1...Se1
- 2.a8Q#
- 2.a8B#
- 1...Sg1
- 2.a8Q#
- 2.a8B#
- 1...Sd2
- 2.a8Q#
- 2.a8B#
- 1...Sh2
- 2.a8Q#
- 2.a8B#
- 1...Sh4
- 2.a8Q#
- 2.a8B#
- 1...Se5
- 2.Sf4#
- 1...Sb2
- 2.Sc3#
- 2.a8Q#
- 2.a8B#
- 1...Sc3
- 2.Sxc3#
- 2.a8Q#
- 2.a8B#
- 1...Sc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...g6
- 2.Qxe4#
- threat
- 1.a7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- Q(f);N_GUARD::QAB1(G),XR(c)
- R(c);CHECK,OGATE,P_SPINR(c),P_SPINS(a),XS(F)::R1(C),XR(c)
- R(c);N_PINS(F),P_SPINS(a),SBLOCK,XR(K)::R(C)+S(F)
- B(g);CHECK,N_GUARD::R1(K),XB(g)
- B(g);N_GUARD::R1(K)
- S(a);OGATE,P_SPINR(c),P_SPINS(a),XS(F)::R1(C),XS(a)
- S(a);P_SPINR(c),S_CUTB(g)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- P(e);S_CUTQ(f)::QAB1(G),XR(c)
- Actual
- P(J);
- Threat
- P=Q
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),P_SPINS(a),XS(F)::R1(C),XR(c)
- B(g);CHECK,N_GUARD::R1(K),XB(g)
- R(c);N_PINS(F),P_SPINS(a),XS(A)::P=Q
- R(c);P_SPINS(a),XQ(G)::P=Q
- R(c);N_PINS(F),P_SPINS(a),SBLOCK,XR(K)::R(C)+S(F)
- B(g);XB(D)::P=Q
- B(g);N_GUARD,XP(J)::R1(K)
- B(h);XR(K)::P=Q
- S(a);P_SPINR(c),XP(I)::P=Q
- Q(f);::P=Q
- R(c);N_PINS(F),P_SPINS(a)::P=Q
- R(c);P_SPINS(a)::P=Q
- B(g);::P=Q
- B(h);::P=Q
- S(a);P_SPINR(c)::P=Q
- S(a);P_SPINR(c),S_CUTB(g)::S(A)
- S(b);N_GUARD::S(A)
- P(e);S_CUTQ(f)::QAB1(G),XR(c)
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).