MESON Chess Problem Database
Problem Display
PID: 78692 (8/7p/2ppN1nK/p1p5/P3R3/1RpkPQ2/1P5p/1n1BB1bN w - - 0 1)
Gevers, Raymond
Die Schwalbe, 1930
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Bf2
- 2.Sxf2#
- 1...Bxe3+
- 2.Qxe3#
- 1...Sd2
- 2.Rxc3#
- 1...Sa3
- 2.Rxc3#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Rd4#
- 1...d5
- 2.Sxc5#
- 1...Bf2
- Tries
- 1.Kh5?
- 1...Sf4+
- 2.Sxf4#
- 1...Bxe3
- 2.Sf2#
- 2.Qxe3#
- 1...Bf2
- 2.Sxf2#
- 1...Sd2
- 2.Rxc3#
- 1...Sa3
- 2.Rxc3#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Rd4#
- 1...d5
- 2.Sxc5#
- 1...h6!
- 1...Sf4+
- 1.Kxh7?
- 1...Bxe3
- 2.Sf2#
- 2.Qxe3#
- 1...Bf2
- 2.Sxf2#
- 1...Sd2
- 2.Rxc3#
- 1...Sa3
- 2.Rxc3#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Rd4#
- 1...d5
- 2.Sxc5#
- 1...Sf8+!
- 1...Bxe3
- 1.Sg5?
- threat
- 2.Qe2#
- 2.Qf1#
- 1...Bf2
- 2.Sxf2#
- 2.Qe2#
- 1...Sd2
- 2.Rxc3#
- 2.Qe2#
- 1...Sf4!
- threat
- 1.Ra3?
- 1...Bxe3+
- 2.Qxe3#
- 1...Sf4
- 2.Sxf4#
- 1...Bf2
- 2.Sxf2#
- 1...Sd2
- 2.Rxc3#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Rd4#
- 1...d5
- 2.Sxc5#
- 1...Sxa3!
- 1...Bxe3+
- 1.Rbb4?
- threat
- 2.Qe2#
- 2.Qf1#
- 1...Bxe3+
- 2.Rxe3#
- 2.Qxe3#
- 1...cxb4
- 2.Rd4#
- 1...Sf4
- 2.Sxf4#
- 1...Bf2
- 2.Sxf2#
- 2.Qe2#
- 1...Sd2
- 2.Qe2#
- 1...c4
- 2.Rd4#
- 1...axb4!
- threat
- 1.Rc4?
- threat
- 2.Qe2#
- 2.Qe4#
- 1...Kxc4
- 2.Qe4#
- 1...Sf4
- 2.Qe4#
- 1...Sd2
- 2.Rbxc3#
- 2.Rcxc3#
- 2.Qe2#
- 1...d5
- 2.Qe2#
- 1...Bxe3+!
- threat
- 1.Rf4?
- threat
- 2.Qe2#
- 2.Qe4#
- 1...Sd2
- 2.Rxc3#
- 2.Qe2#
- 1...d5
- 2.Sxc5#
- 2.Qe2#
- 1...Sxf4!
- threat
- 1.Qg2?
- threat
- 2.Bc2#
- 2.Qc2#
- 1...Bf2
- 2.Sxf2#
- 1...Sd2
- 2.Rxc3#
- 1...Sa3
- 2.Rxc3#
- 1...Bxe3+!
- threat
- 1.bxc3?
- 1...Bxe3+
- 2.Qxe3#
- 1...Sxc3
- 2.Rxc3#
- 1...Sf4
- 2.Sxf4#
- 1...Bf2
- 2.Sxf2#
- 1...Sa3
- 2.c4#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Rd4#
- 1...d5
- 2.Sxc5#
- 1...Sd2!
- 1...Bxe3+
- 1.Kh5?
- Keys
- 1.Qf5!
- 1...Bxe3+
- 2.Rf4#
- 1...Sf4
- 2.Sxf4#
- 1...Bf2
- 2.Sxf2#
- 1...Sd2
- 2.Rxc3#
- 1...Sa3
- 2.Rxc3#
- 1...Sh4
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Se7
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sh8
- 2.Sf4#
- 1...c4
- 2.Re5#
- 1...d5
- 2.Sxc5#
- 1...Bxe3+
- 1.Qf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(b);N_GUARD::S(C),XB(b)
- B(b);CHECK,OGATE,P_SPINB(b),XP(F)::QAR1(G),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- S(j);N_GUARD::S(J),XS(j)
- S(j);N_GUARD::S(J)
- P(g);N_GUARD::R1(I)
- P(i);N_GUARD::S(J),XP(g)
- Tries
- Try
- K(K);P-FLIGHT
- Vars
- S(j);CHECK,N_GUARD::S(J),XS(j)
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- S(j);N_GUARD::S(J)
- P(g);N_GUARD::R1(I)
- P(i);N_GUARD::S(J),XP(g)
- Refutation
- P(k);
- Try
- K(K);P-FLIGHT,XP(k)
- Vars
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- S(j);N_GUARD::S(J),XS(j)
- S(j);N_GUARD::S(J)
- P(g);N_GUARD::R1(I)
- P(i);N_GUARD::S(J),XP(g)
- Refutation
- S(j);CHECK
- Try
- S(J);
- Threat
- DUALS(2)
- Refutation
- S(j);
- Try
- R(E);
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XP(F)::QAR1(G),XB(b)
- S(j);N_GUARD::S(J),XS(j)
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- S(j);N_GUARD::S(J)
- P(g);N_GUARD::R1(I)
- P(i);N_GUARD::S(J),XP(g)
- Refutation
- S(a);N_SPINP(d),XR(E)
- Try
- R(E);N_PINP(d)
- Threat
- DUALS(2)
- Vars
- P(g);N_GUARD,XR(E)::R1(I)
- S(j);N_GUARD::S(J),XS(j)
- S(a);::QAB1(G)
- P(g);N_GUARD::R1(I)
- Refutation
- P(f);XR(E)
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- K(e);N_SPINP(d),S_FLIGHT,XR(I)::QAR2(G)
- S(j);::QAB1(G)
- P(i);::QAB1(G)
- Refutation
- B(b);CHECK,P_SPINB(b),XP(F)
- Try
- R(I);
- Threat
- DUALS(2)
- Refutation
- S(j);XR(I)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- Refutation
- B(b);CHECK,XP(F)
- Try
- P(D);XP(d)
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XP(F)::QAR1(G),XB(b)
- S(a);OGATE,P_SPINS(a),XP(D)::R1(E),XS(a)
- S(j);N_GUARD::S(J),XS(j)
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R(E)+P(D)
- S(j);N_GUARD::S(J)
- P(g);N_GUARD::R1(I)
- P(i);N_GUARD::S(J),XP(g)
- Refutation
- S(a);
- Try
- Actual
- Q(G);
- Vars
- B(b);CHECK,SBLOCK,XP(F)::QAB(G)+R(I)
- S(j);N_GUARD::S(J),XS(j)
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::R1(E),XP(d)
- S(j);N_GUARD::S(J)
- P(g);SBLOCK::QAB(G)+R(I)
- P(i);N_GUARD::S(J),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).