MESON Chess Problem Database

Problem Display
PID: 261951 (5K1k/8/b3Rpp1/3Q1p2/r7/5p1N/3r4/3q3R w - - 0 1)

Ellerman, Arnoldo

Problemnoter, 1962

5K1k/8/b3Rpp1/3Q1p2/r7/5p1N/3r4/3q3R

#2

5 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kh7
      • 2.Sg5#
  • Tries
    • 1.Sg1+?
      • 1...Rh4
        • 2.Rxh4#
      • 1...Rh2!
    • 1.Sf2+?
      • 1...Rh4
        • 2.Rxh4#
      • 1...Qxh1!
    • 1.Sf4+?
      • 1...Rh2
        • 2.Rxh2#
      • 1...Qxh1!
    • 1.Ree1?
      • threat
        • 2.Qg8#
      • 1...Kh7
        • 2.Sg5#
      • 1...Rxd5
        • 2.Sf4#
      • 1...Bc4
        • 2.Sf2#
      • 1...Qb3!
    • 1.Re2?
      • threat
        • 2.Qg8#
      • 1...Kh7
        • 2.Sg5#
      • 1...Qb3
        • 2.Sf4#
      • 1...Bc4
        • 2.Sg1#
      • 1...Rxd5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qg8#
      • 1...Kh7
        • 2.Sg5#
      • 1...Rxd5
        • 2.Sg1#
      • 1...Qb3
        • 2.Sf2#
      • 1...Bc4
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(i);P-FLIGHT::R(A)+S(B),DCHECK
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::R(A),XR(d)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • S(B);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::R(A),XR(d)
      • Refutation
        • Q(a);XR(A)
    • Try
      • S(B);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::R(A),XR(b)
      • Refutation
        • Q(a);XR(A)
    • Try
      • R(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(i);P-FLIGHT::R(A)+S(B),DCHECK
        • R(b);N_GUARD,XQ(C)::R(A)+S(B)
        • B(f);S_CUTR(d)::R(A)+S(B)
      • Refutation
        • Q(a);
    • Try
      • R(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(i);P-FLIGHT::R(A)+S(B),DCHECK
        • Q(a);N_GUARD::R(A)+S(B)
        • B(f);S_CUTR(d)::R(A)+S(B)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • R(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(i);P-FLIGHT::R(A)+S(B),DCHECK
      • R(b);N_GUARD,XQ(C)::R(A)+S(B)
      • Q(a);N_GUARD::R(A)+S(B)
      • B(f);S_CUTR(d)::R(D)
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