MESON Chess Problem Database

Problem Display
PID: 277015 (2r1b2b/N6Q/5p2/8/1P1kPP2/Npp3RK/q4P2/4R3 w - - 0 1)

Ellerman, Arnoldo

To Mat, 1956

2r1b2b/N6Q/5p2/8/1P1kPP2/Npp3RK/q4P2/4R3

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.S7b5#
    • 1...Bb5
      • 2.S7xb5#
    • 1...Bh5
      • 2.S7b5#
      • 2.Qd7#
    • 1...Bg6
      • 2.S7b5#
      • 2.Qd7#
    • 1...Bd7+
      • 2.Qxd7#
    • 1...Bf7
      • 2.S7b5#
    • 1...b2
      • 2.Rd1#
    • 1...f5
      • 2.Qxh8#
  • Tries
    • 1.Sc6+?
      • 1...Bxc6
        • 2.Qa7#
      • 1...Rxc6!
    • 1.Qh5?
      • threat
        • 2.Qd5#
      • 1...Bxh5
        • 2.S7b5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rd8
        • 2.Qc5#
      • 1...Bc6
        • 2.Qc5#
      • 1...Bf7
        • 2.S7b5#
      • 1...b2
        • 2.Qd1#
      • 1...f5
        • 2.Qxh8#
      • 1...Bd7+!
    • 1.Qb7?
      • threat
        • 2.Qd5#
      • 1...Bd7+
        • 2.Qxd7#
      • 1...Rc6
        • 2.S7b5#
      • 1...Rd8
        • 2.Qb6#
      • 1...Bc6
        • 2.Qb6#
      • 1...Bf7
        • 2.S7b5#
      • 1...b2
        • 2.Rd1#
      • 1...Rc5!
    • 1.Qf7?
      • threat
        • 2.Qd5#
      • 1...Bd7+
        • 2.Qxd7#
      • 1...Bxf7
        • 2.S7b5#
      • 1...Rd8
        • 2.Qc4#
      • 1...Bc6
        • 2.Qc4#
      • 1...b2
        • 2.Sc2#
      • 1...Rc5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rd8
        • 2.Qc5#
      • 1...Bc6
        • 2.Qc5#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.S7b5#
      • 1...b2
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(f);S_CUTB(g)::S(I)
    • B(g);N_GUARD::S(I),XB(g)
    • B(g);CHECK,N_GUARD::QAR(J),XB(g)
    • B(g);N_GUARD::S(I)
    • P(b);S_CUTQ(a)::R(A)
    • P(e);OGATEB::QAB(J),XB(h)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • B(g);XS(I)::QAB(J)
      • Refutation
        • R(f);XS(I)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • B(g);N_GUARD,XQ(J)::S(I)
        • R(f);N_GUARD::QAB1(J),XR(f)
        • R(f);N_GUARD::QAB1(J)
        • B(g);S_CUTR(f)::QAB1(J)
        • B(g);N_GUARD::S(I)
        • P(b);S_CUTQ(a)::QAR(J)
        • P(e);OGATEB::QAB(J),XB(h)
      • Refutation
        • B(g);CHECK
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • B(g);CHECK,N_GUARD::QAR(J),XB(g)
        • R(f);S_CUTB(g)::S(I)
        • R(f);N_GUARD::QAB(J)
        • B(g);S_CUTR(f)::QAB(J)
        • B(g);N_GUARD::S(I)
        • P(b);S_CUTQ(a)::R(A)
      • Refutation
        • R(f);
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • B(g);CHECK,N_GUARD::QAR(J),XB(g)
        • B(g);N_GUARD,XQ(J)::S(I)
        • R(f);N_GUARD::QAR1(J)
        • B(g);S_CUTR(f)::QAR1(J)
        • P(b);N_GUARD,S_CUTQ(a)::S(C)
      • Refutation
        • R(f);
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • R(f);N_GUARD::QAB1(J),XR(f)
      • R(f);N_GUARD::QAB1(J)
      • B(g);S_CUTR(f)::QAB1(J)
      • B(g);N_GUARD,P_PINQ(J)::QAR(J),XB(g)
      • B(g);N_GUARD::S(I)
      • P(b);S_CUTQ(a)::R(A)
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