MESON Chess Problem Database

Problem Display
PID: 67795 (7B/8/1Q6/3PP3/1K1nB2P/2NPkp2/RN5P/2R5 w - - 0 1)

Grossman, Itzhak

Hirschenson, Aaron

5th HM., FIDE Ty., 1963

7B/8/1Q6/3PP3/1K1nB2P/2NPkp2/RN5P/2R5

#2

13 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qh6#
    • 1...Kf2
      • 2.Sc4#
    • 1...f2
      • 2.Qh6#
  • Tries
    • 1.Ka3?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Ka4?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Ka5?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Bh7?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...Kf4
        • 2.Qxd4#
      • 1...f2!
    • 1.Bf6?
      • 1...Kd2
        • 2.Bg5#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Bg5#
      • 1...Kf4!
    • 1.Bg7?
      • 1...Kd2
        • 2.Bh6#
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Bh6#
        • 2.Qh6#
      • 1...Kf4!
    • 1.Rca1?
      • 1...Kd2
        • 2.Sc4#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Rb1?
      • 1...Kd2
        • 2.Sc4#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Rd1?
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.Rf1?
      • threat
        • 2.Qh6#
      • 1...Kd2
        • 2.Sc4#
      • 1...Kf4!
    • 1.Rh1?
      • 1...Kd2
        • 2.Sc4#
      • 1...Kf2
        • 2.Sbd1#
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
    • 1.h5?
      • 1...Kd2
        • 2.Qh6#
      • 1...Kf2
        • 2.Sc4#
      • 1...f2
        • 2.Qh6#
      • 1...Kf4!
  • Keys
    • 1.Rg1!
      • 1...Kd2
        • 2.Sc4#
      • 1...Kf2
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qh6#
      • 1...f2
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
    • K(a);S_FLIGHT::R(B)+S(C)
    • P(b);SBLOCK::QAB(L)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • B(H);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
        • K(a);S_FLIGHT::R(B)+S(C)
        • K(a);N_SPINS(c),S_FLIGHT::QAR2(L),XS(c)
      • Refutation
        • P(b);
    • Try
      • B(M);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::B(M)
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::B(M)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • B(M);
      • Vars
        • K(a);S_FLIGHT::R(B)+S(C)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::R(B)+S(C),DCHECK
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::R(B)+S(C),DCHECK
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB(L)
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::R(B)+S(C),DCHECK
      • Refutation
        • K(a);N_SPINS(c),P_SPINP(b),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::R(B)+S(C),DCHECK
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • P(I);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
        • K(a);S_FLIGHT::R(B)+S(C)
        • P(b);SBLOCK::QAB(L)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(a);N_SPINS(c),S_FLIGHT::R(B)+S(C),DCHECK
      • K(a);S_FLIGHT::QAB(L),XS(c)
      • K(a);N_SPINS(c),S_FLIGHT::QAB(L)
      • P(b);SBLOCK::QAB(L)
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