MESON Chess Problem Database
Problem Display
PID: 274728 (5r2/2Rp4/7B/1R1Bn3/3kP3/r1p3pK/1n6/NbN1Q1b1 w - - 0 1)
Zappas, Byron
2nd HM., To Mat, 1952
#2
9 + 10
| 15601 | Albrecht-Leiss-Degener Collection | 2024 |
SOLUTION
- SOUND
- Sets
- 1...Rxa1
- 2.Qxc3#
- 1...Ra2
- 2.Sab3#
- 2.Qxc3#
- 1...Rb3
- 2.Saxb3#
- 1...Ra4
- 2.Sab3#
- 2.Qxc3#
- 1...Ra5
- 2.Sab3#
- 2.Qxc3#
- 1...Ra6
- 2.Sab3#
- 2.Qxc3#
- 1...Ra7
- 2.Sab3#
- 2.Qxc3#
- 1...Raa8
- 2.Sab3#
- 2.Qxc3#
- 1...Rf2
- 2.Be3#
- 2.Qe3#
- 1...Rfa8
- 2.Qxg1#
- 1...Rb8
- 2.Qxg1#
- 1...Rc8
- 2.Qxg1#
- 1...Rd8
- 2.Qxg1#
- 1...Re8
- 2.Qxg1#
- 1...Rg8
- 2.Qxg1#
- 1...Rh8
- 2.Qxg1#
- 1...Ba2
- 2.Sc2#
- 1...Bc2
- 2.Sxc2#
- 1...Bxe4
- 2.Qxe4#
- 1...Bh2
- 2.Be3#
- 2.Qe3#
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...Sbd3
- 2.Se2#
- 1...Rxa1
- Tries
- 1.Scb3+?
- 1...Kd3
- 2.Rxc3#
- 1...Rxb3!
- 1...Kd3
- 1.Ba2?
- threat
- 2.Rd5#
- 1...Bxa2
- 2.Sc2#
- 1...Be3
- 2.Qxe3#
- 1...Ra5
- 2.Sab3#
- 1...d5
- 2.Rxd5#
- 1...Bxe4!
- threat
- 1.Bb3?
- threat
- 2.Rd5#
- 1...Bxe4
- 2.Qxc3#
- 1...Be3
- 2.Qxe3#
- 1...d5
- 2.Rxd5#
- 1...Ra5!
- threat
- 1.Bc4?
- threat
- 2.Rd5#
- 1...Bxe4
- 2.Se2#
- 1...Be3
- 2.Qxe3#
- 1...Ra5
- 2.Sab3#
- 2.Scb3#
- 1...d5
- 2.Rxd5#
- 1...Sc6!
- threat
- 1.Bb7?
- threat
- 2.Rd5#
- 1...Bxe4
- 2.Qxe4#
- 1...Ra5
- 2.Sab3#
- 2.Qxc3#
- 1...Ba2
- 2.Sc2#
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...d5
- 2.Rxd5#
- 1...Sc6!
- threat
- 1.Ba8?
- threat
- 2.Rd5#
- 1...Bxe4
- 2.Qxe4#
- 1...Ra5
- 2.Sab3#
- 2.Qxc3#
- 1...Ba2
- 2.Sc2#
- 1...Be3
- 2.Bxe3#
- 2.Qxe3#
- 1...d5
- 2.Rxd5#
- 1...Sc6!
- threat
- 1.Bg8?
- threat
- 2.Rd5#
- 1...Be3
- 2.Qxe3#
- 1...Ra5
- 2.Sab3#
- 1...Ba2
- 2.Sc2#
- 1...Sc6
- 2.Rxd7#
- 1...d5
- 2.Rxd5#
- 1...Bxe4!
- threat
- 1.Scb3+?
- Keys
- 1.Bf7!
- threat
- 2.Rd5#
- 1...Bxe4
- 2.Qxg1#
- 1...Be3
- 2.Qxe3#
- 1...Ra5
- 2.Sab3#
- 1...Ba2
- 2.Sc2#
- 1...Sc6
- 2.Rxd7#
- 1...d5
- 2.Rxd5#
- threat
- 1.Bf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- R(d);N_GUARD,XS(A)::QAB1(C),XP(e)
- R(d);N_GUARD::S(A),XR(d)
- R(j);N_GUARD::QAB(C),XB(b)
- R(j);N_GUARD,P_PINB(H)::QAB(C),XB(b)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD::S(A),XB(a)
- B(a);OGATE,XP(E)::QAR1(C),XB(a)
- S(c);SBLOCK::S(B)
- Tries
- Try
- S(B);CHECK
- Vars
- K(g);P-FLIGHT,S_CUTR(d)::R1(I),XP(e)
- Refutation
- R(d);XS(B)
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(a);N_GUARD,XB(G)::S(A)
- B(b);N_GUARD::QAB1(C),XB(b)
- R(d);N_GUARD::S(A)
- P(i);::R1(F),XP(i)
- Refutation
- B(a);XP(E)
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(a);SBLOCK,XP(E)::QAB1(C),XP(e)
- B(b);N_GUARD::QAB1(C),XB(b)
- P(i);::R1(F),XP(i)
- Refutation
- R(d);
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(a);SBLOCK,XP(E)::S(B)
- B(b);N_GUARD::QAB1(C),XB(b)
- P(i);::R1(F),XP(i)
- Refutation
- S(h);
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(a);OGATE,XP(E)::QAR1(C),XB(a)
- B(a);N_GUARD::S(A)
- P(i);::R1(F),XP(i)
- Refutation
- S(h);
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(a);OGATE,XP(E)::QAR1(C),XB(a)
- B(a);N_GUARD::S(A)
- P(i);::R1(F),XP(i)
- Refutation
- S(h);
- Try
- B(G);
- Threat
- R1(F)
- Vars
- B(b);N_GUARD::QAB1(C),XB(b)
- R(d);N_GUARD::S(A)
- B(a);N_GUARD::S(A)
- S(h);N_GUARD::R(I),XP(i)
- P(i);::R1(F),XP(i)
- Refutation
- B(a);XP(E)
- Try
- Actual
- B(G);
- Threat
- R1(F)
- Vars
- B(a);SBLOCK,XP(E)::QAB(C),XB(b)
- B(b);N_GUARD::QAB1(C),XB(b)
- R(d);N_GUARD::S(A)
- B(a);N_GUARD::S(A)
- S(h);N_GUARD::R(I),XP(i)
- P(i);::R1(F),XP(i)
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